While Bill Gates visited the UW Wednesday (more from the Badger Herald), Steve Jobs introduced new imacs, ipods (with video playback) and the ability to buy and download video online, via the iTunes music store (lookout Netflix). John Markoff and Laura Holson have more on Jobs introductions:

But Mr. Jobs, Apple Computer’s co-founder and chief executive, concluded a 90-minute presentation at a theater here by framing his plans in the broadest possible terms. “I think this is the start of something really big,” he said. “Sometimes the first step is the hardest one, and we’ve just taken it.”
Apple is not the first company to enter the market for digital video. A range of efforts are under way by consumer electronics companies and studios looking for ways to make high-quality digital video available on computers and hand-held players.

View the presentation here (Wynton Marsalis plays toward the end, which is simply wonderful).