Not to be rude or anything, but this is really a dumb topic. There is a 0% chance of GTA V being an exclusive to any platform. GTA IV was finished for 360 months before it actually released because Rockstar was finishing the PS3 version. If you think Microsoft didn't try to get that to a be timed exclusive, you're dreaming. Rockstar probably named a price, and it was too steep even for MS. The fact is, with the type of numbers GTA games do, it would take huge sums of money to buy the exclusive rights, and at this point in the generation, neither Sony or Microsoft would spend that kind of money when most people have already bought their console this generation. Console Manufacturers buy exclusive rights to sell consoles, not games, and this late in the generation that money isn't as well spent as earlier in the generation. And before you say Sony had timed exclusivity for GTA games last gen; yes, that is correct, but last gen Sony was outselling both their competitors combined, this gen they are in third place. The kind of money Rockstar would need to make up for the lost 360 sales is something Sony just can't pay.
Bottom Line: IT WILL NEVER HAPPEN