Even just the fact that the scope of the games on PC will no longer be so obviously hamstrung by the console market is enough to make me interested in seeing what comes about with the new machines.
I also think it won't be anything like previous console releases - I reckon there will be a load of games ready to go for launch as they're so late at this stage and, by all accounts, the dev kits have been out there for so long that there's got to be a lot of stuff either nearing completion or done already.

