It's the only choice beacuse it's a next generation console in the sense it'll make new things possible. Games have been played the same way since they started, just with varying numbers of buttons and shapes of controllers.
I'll probably end up getting a PS3 first simply for the games I fancy getting. I dunno, I just aint a fan of X-boxes, although I still need an X-brick so I can complete my panzer dragoon set.