For instance, when I did game coding it was always a point to not make the AI smart but make it fun. The core game loop is typically pretty simple code wise, when physics comes into it then it gets a lot more heavy but even then, I see titles like Red Faction Guerrilla on the Ps3 and you can get a glimpse at the potential. Even then, apparently that title only used 2 of the SPE's for the physics system.