Adding support for the card is not an easy process for developers. The makers of Ghost Recon have been criticized for including support for PhysX that winds up decreasing frame rates, because of the greater number of objects that have to be rendered by the graphics card itself. This evokes memories of that early ATI card I mentioned, and suggests that perhaps the technology is not quite ready for prime time.
There’s no doubt that PPU’s will become more popular in the future, but the question is how far into the future exactly? UT2007 is one of the best hopefuls for use with the AGEIA card, so it will be interesting to see what Sweeney pulls off. Check out the full article at Ars.