As to the PS3... It's not better. It really isn't. A processor with little number crunching units, ooh. Handy for... Graphics. And only graphics. Not for AI. And frankly, flashy graphics are pretty tired. For the last two or three years, most games that come out are lauded for their amazing graphics, but evoke no actual enjoyment while playing. None. Again, why do I want that?
To each their own. I tend to find that the games which REALLY stand out from the crowd graphics-wise tend to hav at least respectable AI.
And let's face it, good AI doesn't necessarily make a good game, nor does bad AI ruin an excellent one. Half-Life 2 is repeatedly cited as being the modern great of PC gaming, but most of the AI in that is actually pretty pathetic. (Fire. Strafe back and forth between two hint markers on ground. Reload in plain sight when ammo runs out. throw grenade at random intervals. repeat.). the only two things in the game that actually display any sense at all are the Gunship and the Strider. I've actually used gunships in Hammer, and the damned things are
smart. That "shooting at the rocket" thing originally arose out of the AI, it's not hard-coded. Similarly, if shooting it won't work, I've seen them try to lure the rocket into the scenery instead.
But I digress. The majority of the AI in HAlf-Life 2 is pretty low-grade. It's far surpassed by F.E.A.R, Far Cry, or Black - all if which are graphically excellent games.
If a games team is putting that kind of effort into making the game look nice, nine times out of ten, a similar amount of effort is being put in in other places as well (though not always, I agree).
My understanding was that AI ran on the CPU anyway. there are no dedicated "AI Cards" that I know of. If a system has a more powerful central processor, surely it'll be MORE adept at handling AI, not less?