- Faster GC : GC hint API and more.
- New numeric types : float and float4 (very useful for Molehill in the future).
- Concurrency : Worker threads (shared nothing model) to leverage multicore CPU's. No more UI 's blocked when doing expensive operations.
- Stage3D : The API used for Molehill (that you know through the Incubator builds).
- StageVideo : Allowing full GPU acceleration (decoding + blitting) when used with H.264. Part of Flash Player 10.2 and coming to AIR soon.
- Threaded video pipeline : Will decode non H.264 streams on another thread, Net I/O will also be moved to another thread, all this bringing smoother playback.