I've yet to see solid proof of these so called next gen consoles coming out at that time, just analyst talk and rumour speculation. Then again with the way a lot of people suddenly went from "Pfft, we don't need them" to "We need next gen!" I wouldn't be surprised if these companies latch on to that hype and go along with it earlier than expected. If there was to be a version of GTA V coming out on them (which I also have yet to see any evidence of happening) around that time, I'd only expect it to be done the same way they did Smackdown vs Raw 2007, just a better looking version of it but not developed anywhere near enough to take advantage of the hardware it's on.
Has the hots for: Several friends, that quiet brunette down the street, Kai from Heavenly Sword, sonic_uk, Multiplayerking, Doug, and probably your sister and/or mother.