I was pretty psyched up for the PS3, till I read Blue-Ray's security specs. I dont like the idea of the PS3 dialing up some unknown Sony server to authenticate (similar to DirectTV) movies/games. My money is on Xbox360.
Those security features are for movies, not games. There won't be any dialing home while you're playing GT5.
Either/or is fine with me. We (IBM) make the chips for all of them. LOL