Will you be able to plug your USb-powered Xbox 360 HD-DVD drive into your Vista Media Center and rock out movies in hi-def? Engadget seems to think so.
I've wondered about this same question on this blog before, and after listening to Major Nelson this past weekend, I shot him an e-mail about it. He e-mailed me back and forwarded it on to Albert... who will hopefully have an official answer soon.
If it IS possible, then personally, I think it makes HD-DVD even more compelling. Why buy a $500 player if you already own an Xbox 360 and can get a $200 external drive? I'll be able to take it with me on trips and watch HD movies in my hotel room. Sweet!