I find it problematic to talk about games being immersive, because a process of being immersed is something that depends to a far greater degree on the user than on a product. Even the most immersive cRPG you and I could imagine wouldn't feel the same to someone new to the genre or gaming as a whole. Having played a lot of games already infuses you with the ability to ignore certain leaps of logic that a newbie has a problem with. I once tried to introduce my partner to gaming and after some time of being bombarded by question: "Why can't I do that?" I just gave up. Being immersed is more of an ability that might be made harder or less hard depending on a product.