It's not impossible, I guess, even if Kojima is adamant against its going to the 360. Didn't Ken Levine say there was never going to be BioShock on PS3? And now they're getting not just a port, but an enhanced version.
It's been looking this way for a while, but I think FFXIII shows third party exclusives are going to be really rare ducks this generation - at least until a clear winner (er, second place console) emerges. Development costs are just too high, and the way the hardware is split is really shaking things up.







