I have not heard about Android for a while. Today, I finally heard somethings about that. Android 4.3 will be available.
But there are some improvements only, without any very impressive new functions. The major updates are:
-Multiusers mode:
- A device can be login by different users and you can have a profile for each user to restrict their right too.
- Better 3D
- it has a new rendering engine for games
- Gesture Keyboard
- That is the most impressive I think. You can swift the multi keys to type. That looks similar with SwiftKey.

If you are Nexus 7 user, I think you should have it.
Reference:
-Android - What's New