Off topic: Where's my HD Movie Rental?

This is way off topic for a grid computing blog -- but I have to get it off my chest.

I will never, ever consider buying a set-top box dedicated to online movie rentals (see Vudu, AppleTV, Netflix).

But if Microsoft or Sony announces HD rentals through an XBox 360 or the PS3, I'm buying one immediately.

Why doesn't this exist?

I want a multi-purpose box. Plays my DVDs. Plays games. HD Movie rentals online.

The XBox and PS3 already have HD out and internet connections. Can they just write this software, make some deals with studios, and be done with it? Bill, this is your chance to beat Steve to a punch for once.