How much reality can you bare?

How much "reality" can a computer bring on your screen before you feel compunction for doing something really wrong and bad? For some of us maybe the answer is simple but for me and other people the answer will come only after the games will resemble reality in such a good way that we'll not be sure which is the game and which is the reality. I had the chance to download Test Drive Unlimited, the beta version, and to be among the first people experiencing this new "reality". I'm not gonna get to much into detail but I think it's a really good game but there will be more games in the future which will redefine high-end graphics every time taking us closer and closer to photorealism.