One of the things NVIDIA presented are the multi-touch interfaces that are possible with today's GPUs:
5:50PM - Actually manipulating user interfaces in hugely complex ways (with 10 fingers on many people) is possible because of the GPU today (Anand: correction, this is the coolest demo of the keynote).
5:45PM - Even cooler things can be done with really large screens (Jeff just called 30" displays small). Pretty cool stuff. Multiple people can use a large screen to cooperate on the same computer and screen and even data set without fighting over a cursor.
5:43PM - Jeff is talking about using gestures on a screen to invoke anything you need and get rid of statically positioned interfaces. He's also got some cool particle effects and maps he is showing off as well.
5:41PM - "The mouse has actually become a bottleneck in what we can do," says Jeff Han. He's talking about multi-user multi-touch.
Check it out over here.