Here's a preview of the type of applications you're about to experience thanks to the new Windows Presentation Foundation (Avalon). [To watch it, click the little square icon just under the video]
It's a very neat demo - you don't need to be a developer to enjoy it. Minute 3 is where the action starts.
I had a chance to play with Avalon C# and XAML capabilities during my last 4 months of school. It was super-cool stuff. Can't wait to see more apps taking advantage of it.