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Samsung's decision to use Tizen, a non-Android operating system, on its Gear line of smart watches has mostly been seen as a blow to Google, Android's developer.
If Samsung adopts Tizen more widely in its lineup of mobile devices — particularly if it extended Tizen onto future iterations of its flagship Galaxy and Note models — then it would cut the market share of Android.
Samsung co-CEO J.K. Shin has said he'd like to see Tizen on "everything" that Samsung makes, including phones.
Such a move would (in theory) transfer 25% of the U.S. market to Tizen from Android, according to comScore, and probably an even larger chunk in Asian countries like Japan and Korea. That would leave Google servicing a bunch of also-ran Android phone brands like HTC, LG and Lenovo.
But another way to look at Samsung's Tizen strategy is to consider it from Apple's point of view, and to ask what Samsung wants in terms of its never-ending battle with iPhone, iPad and the iOS mobile system they operate on.

Tizen solves a pair of problems for Samsung.

samsung tizen operating system
Steve Kovach/Business Insider
Samsung's Tizen phone prototype looks just like Android.
For Samsung, there are two huge competitive factors lurking behind Tizen:
  1. Apple has no operating system for "wearables" — smart watches, smart glasses and various connected household gadgets. Tizen puts Samsung ahead of the game in terms of building out a system for the "Internet of things." Tizen also uses less battery power than Android, according to some.
  2. In developing countries, Samsung's market share could easily get eaten by cheap Chinese Android knockoffs — smartphones that cost just $35 that, for low-end users, are just good enough to deter customers from spending the $700 it can cost to buy a top-shelf Samsung Galaxy Note 3. Keeping the Galaxy brand on Android could leave Samsung vulnerable to cheap competition from China.
Of course, Samsung could make a nice, cheap, competitive Android Samsung phone for the low-end market. But Samsung is a publicly traded company, and thus it needs all the profits it can get. (And as Apple stockholders know, high profits do not come from making cheap phones.)
So Samsung appears to have made a tentative decision: having cornered 32% of the phone market globally — more than Apple — it now needs to make sure that its share, and its profit margins, are protected from both high-end competition from Apple and low-end competition from China.

Samsung is already ahead of Apple in many ways.

JK Shin Samsung Press conference MWC
Dan Frommer, Business Insider
Samsung co-CEO J.K. Shin
It is less obvious how Tizen helps Samsung fend off Apple, however.
So ... consider that Samsung is more nimble than Apple in a bunch of ways.
Samsung launched first into the smart watch business. It has already unveiled three different iterations of its Gear smart watch. The last two of those devices are running Tizen.
Apple has yet to leave that starting gate on watches.
Now consider that Samsung has also led the race in terms of large format "phablet" phones. People laughed when the gigantic Note phone was launched. But talk to Note users and you'll hear, repeatedly, how much they love their big screens.
Again, Apple finds itself stuck in Munchkin Land when it comes to screens. (In fact the iPhone 5 was Apple's runner-up version of a large-screen phone.)
Tizen is being built by an open-source consortium backed by Samsung, Intel and a bunch of wireless carriers — and not Google. As the dominant development partner, Samsung will get to decide how quickly Tizen gets updated. It no longer has to wait for Google (which, like Apple, has not yet rolled out its wearables operating system version of Android). And the wireless carriers (Orange, Sprint and Vodafone) will doubtless support a format they've had a hand in making.
This is key because Samsung has a history of innovating faster than Apple. People criticize Samsung for launching loads of products, only to see many of them fail. But the flipside is that Samsung is very good at shipping new products quickly — and it doesn't matter if many of them fail as long as a handful, like the Galaxy and Note lines, become huge hits. Apple hasn't shipped a new format phone since 2012.
Finally, Samsung has been making smart (or somewhat smart) TVs for years. Apple has yet to sell a single smart TV screen (although it does have the Apple TV digital media player).

The $4 billion challenge to Apple.

Samsung's Tizen phone prototypes have had generally good reviews from critics in part because Tizen looks and feels like Android.
This is important: Samsung could transfer its entire phone user base to Tizen and most customers would not notice. That's one-third of the planet's entire market on a brand-new operating system controlled by Samsung within a handful of product cycles.
In that scenario, Apple has two competitors, Android and Tizen, instead of just one.
Samsung's main challenge to doing this isn't technical. It's environmental. People don't like Apple and Android because of their user-interfaces. They like them because of what they can do — and that means apps, like Facebook, Instagram and Candy Crush Saga. While transferring Samsung's users to Tizen might be technically easy, it would be a massive political problem to persuade hundreds of thousands of Android and iOS developers to populate a Samsung Tizen App Store with all the top apps that consumers want. If Samsung cannot manage this it might end up like Windows Phone: a beautiful device that no one wants.
This, it turns out, is another area where Apple ought to tremble:Samsung's marketing budget is $4 billion, worldwide — four times the size of Apple's. The company has more than enough firepower to promise app developers exposure and media partnerships if they launch on the Tizen platform.
And Samsung itself is a media "platform," of course. Remember whenSamsung paid $5 million to launch the new Jay-Z album, just like an app, on Galaxy phones? Samsung is already creating a cozy non-Apple media environment with Milk, its new competitor to iTunes Radio.
It is not inconceivable that top app makers like King and Rovio — which need new revenue from any source they can get — would partner with Samsung for massive launches on new Tizen Galaxy phones.
This would leave Samsung competing against only one company — Apple — instead of a dozen other Android makers. In this scenario, Android would be left with the low-end discount market that neither Samsung nor Apple want; Samsung and Apple would instead split the high-margin premium market between them.

Apple's worst nightmare.

nightmare
Wikimedia Commons
A bit of a nightmare.
And while Apple fanboys may laugh at the idea that Samsung's devices are on a par with Apple's iPhones and iPads, they may want to consider how much of a head start Samsung has already gotten in terms of solidifying its customer base: Samsung is growing its share of the tablet market, while Apple's share — still top — is in decline. Apple once had 50% of the tablet market in 2011. Now it's barely holding on to a third of sales.
Samsung, meanwhile, tripled its share in the same period.
Samsung's Tizen thus threatens to create a new, scary universe for Apple. One in which its main enemy is not a free-to-use platform developed by a search engine company that doesn't make phones. Instead, Apple would face a foe that has the same platform advantages, but with two horrible differences: a faster innovation record and a bigger ad budget.