1. Optimizing performance with devices that use type Retina display resolution (2048 * 1536), now at 60fps
2. Improved GPU performance up to 30% more on 3D games
3. Android 4.2.2 Optimization with a stable version
4. Google CTS Certification for Android 4.2.2
5. Miracast corrections connection, latency improvement by 50%
6. 20% more improvement on web surfing speed
7. Added support Web GL, to support 3D games online;
8. Optimization of 1080P HD HDMI output for video playback.
9. Optimized power management system.
10. Support Bluetooth 4.0
変更点はこんな感じだとか。ちなみにCUBE U30GT2はベータ版のSDK2.0ベースのFWが出ている