According to recent rumors cited by USA Today, Samsung will be dropping Android for their upcoming refresh of the Galaxy Gear smartwatch. The sources state that the refresh is going to be introduced at the Mobile World Congress later this month, and that it will instead feature Tizen as the operating system.
According to many, the move to Tizen is a good one by Samsung. Android is a great operating system for mobile devices, but perhaps not as suited for smaller scale devices like smartwatches. Tizen can also be used without any problems with the Open Handset Alliance. Not only that, but Samsung is a development partner of Tizen, and because of that they would be able to build a customizable version of it for things like the Galaxy Gear.