For those bitching about gameplay - yes, gameplay hasn't advanced as fast as graphics, but now we're reaching the point where extra graphical achievements are costing a lot of effort and providing minimal rewards, so all that power can be harnessed by the game engine for other purposes.
Good AI takes a lot of processing power. Be happy - this machine provides a lot of processing power.
It'll be a while before people make really good use of it, but the PS4 looks like it will allow more realistic AI behaviour by proving far more CPU cycles to do AI stuff in.
I feel it's unfair to look at the release games and say they're not far beyond the current game titles. Advances take time, and right now people are still thinking as though they're working under the constraints of the current game consoles.