The new features:

* Creative Expression
Custom Filters and Effects
3D Effects
New Text Engine
Text Layout Components
Drawing API Enhancements
Color Management

* Visual Performance Improvements
GPU Compositing
GPU Blitting
Anti-Aliasing Engine (Saffron 3.1)
Vector Data Type

* Rich Media
Dynamic Streaming
RTMFP (Real Time Media Flow Protocol)
Speex Audio Codec

* Other Community Requested Enhancements
File Reference
Dynamic Sound Generation
Large Bitmap Support
Context Menu
GB18030 Compliance
Ubuntu OS Support

Download and more info at Adobe Labs