well it's mostlikely will be the publishers like sony and MS that will push for it seeing that it's an MMO and the fact that it pushed the boundaries of what usually makes an MMO with all the in game voice work and extra stuff like chose's made in game that the other MMO's don't have content wise. It's just cause of that I see them using it as an Excuse for that.
It's not your normal MMO. that and the hard drive space that MMo's usually take up. for them it'll be good enough reason to do so. And their ready to move to the new consoles any way. it's up to the publishers that want it to be so, since every thing else that hasn't been put on the current console ones will be on the Next gen due to the Tech pushing the boundaries on some level.
Dang, didn't see you there ben's . going ninja on me. Any way yeah it's as I said raven, sorry it's just how the boss's of these companies think and what is most likely to be supported. Not that the current consoles won't be supported, but their not going to be as supported by the publishers as the up coming next gens will be.