The game world will be alot bigger that any previous GTA game. "The game world will be much more expansive than just those nighttime city scenes with the neon over and over again". Full day-night cycle, weather, lots of different neighbourhoods and much much more. They are really trying to create an incredible sandbox! Also the shooting and fighting are said to be very realistic, more like an action movie. You will be able to use the enviroment in a totally different way, for example kill someone with a fan or drown someone in a fishtank. They've integrated different types of minigames like gambling, karaoke and dancing. Also alot of cop mini games like surveillance and safe-cracking...."