Julie Larson Green's keynote dedicated to multi-touch capabilities of Windows 7 on D: All Things Digital. Also you could see brand new taskbar - so called superbar.
Courtesy: D6 conference
Microsoft Chairman Bill Gates demonstrates Touch Wall, a new hardware technology from Microsoft that creates a touch-based "white board" interface that lets users interact more naturally with data and applications on their computer.
Demo of new multitouch capabilities of Windows 7. Here you could see photo app, maps app and some more applications that were ported from Surface.
Courtesy: WindowsVistaBlog
This video sposts some great projects run by Microsoft. You can see WorldWide Telescope, Windows Search vNext and some other projects.
Courtesy: Long Zheng