[UPDATED 1:15PM CET, this time with links and tags]
Microsoft does it again. What ? Copying Apple ! See this demo of the forthcoming new OS from Redmond, so-called "Windows 7". Everything single thing you see there is already available on the iPhone and the Mac platforms, thanks to Mac OSX 10.5 aka "Leopard", should Apple release touch-screen based Macs in the next couple of weeks.
To get a multi-touch UI on a PC, you'll get to wait until, hum, 2010. Until then, you be sure I'll be playing with my MacTouch since a while ;-)