Now, here's something that would be a massively tall order for Rockstar, but it would make the world of GTA feel more alive than ever. What if players could go to the airport and fly to 3 or 4 other cities? Few players would actually be expecting 3 or 4 maps the size of Los Santos, but smaller maps like Liberty City in GTA IV, perhaps? To be able to hop on a plane and go to a Las Vegas-type map, and then get on another plane and go to a Washington-type city would be great fun, adding even more variety to a game that will naturally be overflowing with it anyway. It would no doubt be pretty demanding on new-gen tech, but in terms of pushing the boundaries of what games are capable of, this would be an awesome new step for GTA.