He did as one question in his post that I'd like to address:
I wish they’d shown more of Flip 3d and the active thumbnails that rise up from the start bar. Those are the main reasons I boot Vista and why I used it nonstop for a while. Will we be able to build our own active thumbnail apps to replace Flip3d? I hope so!
We actually do have an API in Windows Vista that allows you to take the contents of one window and present them in another Window. This is what is used in the live previews that show up in the tooltips over taskbar buttons, and can be used by developers in their own creative ways.