I think the only way a direct port would have been a success is if you would be able to play online with Vita against your friends on their PS3, and vice versa. But I just don't think its technically possible to do something like that this generation. So since multiplayer is where its at in CoD land, that would be, essentially, the greatest thing to ever happen to the series - to be able to continue playing online against your buddies w/ consoles, even while you're on the road. And all of the DLC and saved info from your PS3 gets clouded over to the your Vita for a seamless transition. Hopefully some day there can be a more universal PSN that can do such a thing. In the meantime, Vita remains pretty unnecessary as far as core gaming goes.
