You gotta remember bro. It isn't the fact that current machines can't handle it. It is the fact that programmers can't afford to make things like that. You will never see games that realistic anytime soon. Can you imagine how much games would cost?! they would be like 100+ bucks a pop. The xbox 360 could handle graphics like that as well but it just wont happen until the technology and programming gets cheaper.
Programmers are getting smarter recently, though, adding in advertisements to their games. Coca-Cola street signs and stuff
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But that cell technology is amazing. Lets see if it ever catches on.