If you've seen the Microsoft CES 2007 presentation you'll have noticed the cool new video desktop feature. This available as free update for Vista Ultimate users. The Preview version of DreamScene was released last week.
DreamScene supports WMV and MPG video files. It only comes with one sample video file (not the one from CES that is sold by Corbis) with subtle movements making it suitable for desktop background use. WinCustomise.com have made a DreamScene enhancement that allows it to support the newly created .dream files. You can also download about 15 videos on the site.
Lots of forums are getting floods of requests for HD or DreamScene suitable video. Some good ones can be found here. There is definitely a market out there for a company to sell high-quality DreamScene desktops.
If you have Vista Ultimate do a Windows update and look for an optional Ultimate Extra called DreamScene Preview.
You can view some DreamScene videos in action on YouTube. I can't embed the video here but you can view them on my external blog post