It won't be just the BB10 OS that will be gone, as it's almost gone now, but Blackberry as a phone producer, in its entirety. Will Win Phone be around in 2020? I think it's questionable, at best. Some commentators insist that Win Phone is crucial to Microsoft's future, but it's pretty obvious that it isn't. And while Samsungs Tizen, as a Phone OS, has never gone anywhere, the small number of phones with that that they sell in India alone exceeds the number of Blackberry phones sold worldwide, and likely the number of Win Phone devices as well, as the trajectory of that continues its rapid slide to nowhere.