From the leaked screenshot, the Blackberry 10 OS will have :
- New homescreen (large widgets on the screen that remind you of the live tiles in Windows Phone).
- New bar at the bottom(looks like Nokia's Belle OS).
- New application drawer (New icon, folder).
- Image on in-call screen (showing a large picture of the caller on top and large touch buttons, including one for video calls).
We don't know when Blackberry 10 OS is getting ready for public. However from the screenshot it look promising.