We all know the game cannot go on forever, but with that much content, it certainly would be enough to keep it going for a long time. At some point, the generation of gamer will change and the genre will disappear along with it, but until then, Rockstar is sitting on a gold mine in terms of video game sales.
Some of the rumors for GTA 6 that have made it to the web include a awesome collection of cars to choose from and even the fact that you might be able to get into a relationship within the game. These are rumors of course, but all things that are possible within a video game world like the one in Grand Theft Auto.
Moving a video game like GTA 6 to include things like family life can really change the dynamic of the game and the fact that some gamers are not likely to care about that aspect when they just want to steal cars and do damage.