I scored one of the only copies of Windows 7 Touch Pack out in the wild, and it really blew my mind, bringing the full power of Microsoft Surface to touch-enabled Win 7 PCs. Have a look:
Before he retired, Bill Gates said that "natural" interfaces would be the next big thing in computing. True to the master's prediction, Microsoft is integrating more gesture and writing controls into their OS than ever before, including—for the first time—genuine multitouch.
I installed Windows 7 Beta on an HP TouchSmart PC over the weekend, getting cozy with the new touch and multitouch features, then loaded up a sweet two-handed Air Hockey demo. Have a look: