The thing about Rockstar is that they will focus more on the little stuff to make this a great game. Graphics wise, From my 3d renders that ive made i can tell you that LIGHTING is everything. I did a 3d render of my classroom and it blew, til i looked up how to add lighting in 3ds max. From shots that i have seen, rockstar will improve little things as the environment, Looks, graffiti, the simple movements of models, And so on. Like many posters before me, I can tell you that the game play its self has hardly changed. They have the same team working on this game that has worked on gta3 and up. So im here along side with many others. This game will be great, no doubt. Gameplay = missions, Sidemissions... and ect. Rockstar has a great artistic view on how they use real life and twist it around so much. Loved all the gta games, never have been disappointed.
Sry it is a long post Just my imput and a few others about whats to come of this game.