The Ageia website lists a bunch of titles which will "support" the card, but they don't say how much any one game will actually use it.
I think it could have great applications for eye candy and interactive environment stuff, but if the developers won't learn how to use it then it'll die.
There are some places where AH could possibly use it though... I'm thinking clouds and smoke that interact with the environment and planes. Imagine a real looking smoke plume where if you fly through it, you see it swirl from wingtip vortices. That sort of thing wouldn't necessarily affect gameplay so it could be a configurable option, but it sure would look cool.
But just like dual core use, it'll take time for the developers to figure out how to do it right and I don't think anyone is under the impression that HT and Pyro are looking for more stuff to do
I think it's a HUGE mistake to simply dismiss dual cpu use and off-cpu physics calculations as being worthless, but it's not obvious at all whether the payoff would be worth the effort.
From a publicity point of view though, it could be huge. Imagine the "free" publicity if AH was listed on the Ageia website as being physx "enhanced"... It wouldn't even have to be much, maybe some more eye candy in trees and stuff for GVs to bump into. But once it's official, AH could get put on the official "AGEIA ENHANCED!!!11one" list and instant bonus advertising at the cost of however much time HT/Pyro put into coading for it.
My prediction is that AH will continue as before though, based on my impression that almost every new technology has been dismissed as not applying to [CK.WB,AH,AH2]. Eventually some make it into the game, but adopting every new technology into the game has never seemed to be a prioirity for HT. It seems like he's pretty busy with his planned upgrades even without chasing after the revolutionary hardware flavor of the week