Fidelity on channel9
Channel9 has a video up right now with Hakon Strande, one of my team's program managers, talking about next generation audio devices.
Most of the video is about HD Audio, the new audio hardware spec from Intel. They also spend several minutes in the video talking about audio fidelity on Windows in general (not good), and the new fidelity logo program that we're rolling out with Vista to make it a lot better.
Hakon and David do a pretty good job of signposting where audio quality is going for the next generation of Windows PCs. If you want some good news about PC sound, I recommend you go see this video.