Honestly the balls scratchre makes more sense ...
I'v thought about it , the only real use for this would be if you wanted to play against a supercomputer class oponent in chess/ any strategy game.. Most AI in strat games just follow a script , but if you were to give AI to every individual unit , and a very smart ai 'General' that will analyze your strategy and find weaknesses.. Offload all that coding to your AI card and your good....
FPS games won't make much sense , not much strategy needed except for tactical ones , and no matter what happens , who can shoot faster and better will win... And you can already set the AI in some games to start firing 0.0000001 seconds after they see you, instead of the ordinary 0.1 or so depending on game and dificulty...
And to top it off.. only a handful of l33t gamers can actually handle super smart AI like that anyway....... so its a waste of money for your average guy .