Just noticed these mobile related features in new beta versions : http://www.bytearray.org/?p=3216
Feel free to complete by commenting.
Native Text Input UI (mobile)
Mobile apps can now take advantage of the native text input controls on mobile platforms, including platform-specific user interaction behaviors such as magnification and text selection. Native text controls are available on Android, BlackBerry Tablet, and iOS operating systems.
Stage Video Hardware Acceleration (new for AIR)
Leverage hardware acceleration of the entire video pipeline to deliver efficient, best-in-class high-definition (HD) video playback experiences. Decrease processor usage and enable smoother video, reduced memory usage, and higher fidelity on mobile*, desktop, and TV devices (*supported on Android 3.1, BlackBerry Tablet OS, and iOS).