I strongly suspect misdirection. There are no games right now that have openly declared themselves to be on next-gen platforms, even though the amount of noise we're seeing suggests that both MS and Sony will drop their new boxen before the holidays.
They pretty much have to say "360 and PS3", because "next gen consoles" or "unknown platforms" would be a dead giveaway. I expect them to make another announcement next week amending this, after the official unveiling of Sony's new machine.
I expect it'll depend on which comes out first, the game or the new consoles. They seem optimistic that the game will come first, so they'll get loads of sales on the old hardware. Then when the new hardware comes out, you'll have to purchase it again to continue playing on your new hardware.
I don't really see anything wrong with this. I can't imagine it costs much to port from 360 to Infinity (and PS3 to PS4). They get a wider user-base, which is extremely important for an MMO, and many will buy the game twice when they eventually upgrade their consoles.
Except I seem to recall them saying it would not be in this fiscal year, which likely runs at least through this year (based on the giant bomb vid linked elsewhere in the discussion of this post). If so, the PS4 at a minimum is all but certainly coming out this year, and rumors are the neXtBox is as well.
