So what could Windows® SideShow™ enable on UMPC?

Click to see the video

Disclaimer: Images on this video are manipulated, not actual product.

Follow up: Steve don't see the attraction

Prototype SideShow on UMPC, no need for extra screen!

Click to see the video

SideShow needs 70 to 90% less battery compared using full os. You could listen music, read emails, browse contacts etc. many times longer..

UMPC stuff at the end. Includes Intel Mobile Metro and other SideShow laptops too.

High Resolution, Windows Media ( VC-1/WMA | 1920x1080 )

Good site with more SideShow info

Building Remote And Integrated Auxiliary Display Devices For Windows SideShow

Microsoft site with more SideShow info

Video source