Below is a video clip of a multi-touch photo presentation system running Windows 7: Gesture + Touch - has gesture and physics engines.
Apparently the application can run on Vista, Win 7, and Win 7 Touch.
Here is an HP TouchSmart PC, running a Touch Map application on Windows 7:
The following clip is of a newscaster using a multi-touch transparent screen.The display is from U-Touch Ltd. a partner of NextWindow. In my opinion, the application enhances the viewers understanding of the various news topics, and is visually appealing as well.
The graphics engine used in this application was developed by Vizrt, the same folks who were behind CNN's video hologram. Here are a few pictures from the Vizrt website:
The holograph "transporter" room.
For more videos using Windows 7 apps, see creamhackered's YouTube channel. (Videos appear to be from NeoWin Net.)
Windows 7 Design Concepts and Usability Tests