So what sort of UI improvements are we talking?
It's a completely new UI concept from the ground up.
Windows (xp, vista, 7) are built on a graphics subsystem called GDI. The new UI is not based on that subsystem, but built from new mmx custom graphics routines (it's the reason that things have gone very quiet of late).
The main reason for this new development is speed. The new system is running at the cpu level and not the os level and is blisteringly fast. It is developed for realtime applications.
if you want an application to look and feel like; windows, mac osx, ableton, iphone, lemur, virtual synthesisers (roland, yamaha, etc). then we can do it.
This is a quick snapshot of the gui system in operation. These are direct screenshots and give an indication of some of the things that it can do.