During the Microsoft keynote, Ballmer mentioned that customers of IPTV providers like AT&T U-Verse will be able to watch TV on Windows 7 PCs, but he glazed over the how. The how is Windows 7 Media Center -- according to the press release that is available after the jump -- and there's no special hardware like a tuner required. The when wasn't mentioned because it is dependent on the provider, but when they do upgrade to Mediaroom 2.0, Media Center fans will have access to