Final Cut Pro 5: RT Extreme
Dynamic RT Extreme delivers high-quality, real-time effects in every format, including uncompressed HD.
It Dynamilcally adjusts the quality on the fly, they have a demo running 16 streams of HD that drop the quality to keep it in RT, then back to 1 stream and the quality jumps back to 100%
Final Cut Pro 5: Multicam Editing
Powerful multicam editing tools let you cut video from multiple sources in real time.
This looks really cool, and seems a much better implementation that I have seen on other systems
Final Cut Pro 5: Native HDV
Native editing lets you work in any format, from DV and HDV to IMX, DVCPRO HD and uncompressed SD and HD.
This is great for anyone with a HDV format camera, AND it really lets you edit on any frame.