Soldato
I got really excited with physX, had an original Ageia PhysX only card. Ghost recon with the over exaggerated trees in the wind, Batman and a few others. Unfortunately, it never really went in the direction I imagined. nVidia bought them, got it running on the cuda cores but then stagnated for whatever reason. Games are beautiful today, but physics hadn't really progressed.
I like graphics getting better as much as the next man/woman/person, but the lack of advancement in AI and physics is disappointing, to say the least.