Tizen Vs. Android
If you've used Samsung Gear, then you're using a device running Tizen. The Z will be running Tizen 2.2.1 with Samsung's TouchWiz UI overlay on top, which reportedly makes it compatible with Android apps. This might be the saving grace for a Tizen-based phone, which otherwise has no apps to speak of. The Z will premier in Russia in the third quarter, Samsung said in its press release, adding that users in Russia "will be offered to access additional applications through the Tizen Store," which as of this writing was still under construction.