Except install Adobe CS3+
That was a Win2K killer for me - needed a couple of CS3 features and couldn't run it with Win2K. There are other cases too. It's not just DirectX 11 and WMP.
Bill, the main complaint I have with Vista is the default file system navigation is cumbersome to me. Is Windows 7 better?
Sort of an academic question - wife will have a Win7 machine within a month I guess. I can decide then whether or not to be jealous.
My general feeling, though, is "never upgrade the OS on an existing machine beyond patches and fixes". Could be wrong in this case, but it just seems to be more trouble than it's worth.