I would really doubt that will happen, they would lose a lot of money just working for the PS3, right now they get to release their games on all the consoles and 360, Wii, and PC have larger fanbases atm.

If it did occur it would be some of the worst news in gaming and when it came around to time for GTA V I'd look into how far modded PS3s had come about that time. Buy myself a modded PS3 (ensuring Sony doesn't get my money for the console) then pirate the hell out of every Sony game that I might want to play (ensuring they don't get any licensing profit from me. Seriously we won't see another GTA game for at least 2 years if not longer same goes for the Manhunt series so I'm not too concerned right now.