Sixteen wire dancers descended a giant billboard in Manhattan yesterday, to display the colors of Microsoft's Vista . The show, part of a gigantic $500m marketing push for the new operating system , was perfectly coordinated. Unlike Bill Gates' appearance on the Daily Show. The Microsoft founder, at the end of an uneventful interview with the late-night news show's Jon Stewart, abruptly walked off the set. Oops. Gates must have forgotten that lesson in media training: stay seated till the red light goes off and pretend to make casual chit-chat. "He can't just leave," said the surprised host. The clip, after the jump.