- Project Butter : improving UI responsiveness.
- Keyboard and voice input : better and more accurate predictive input and extended dictionary. Voice Typing in now available offline.
- Camera : new UI and gestures.
- Notifications : Music, Pulse and Gmail to be expanded to give you more details without having to open the app.
- Google Search : Natural language commands are now supported.
Jelly Bean will be available mid-July with a developer SDK preview available right now on the Android Developers website.
For more in depth detail, hit the source below.