GPU acceleration is one of the most significant trends in today hardware industry, opening the doors to an entirely class of software running desktop. What will be possible is fascinating to see on a monitor, nut it is not tangible, if you just hear about it. It appears that the next Photoshop (CS4) will be one of the first mainstream applications that will tap into the GPU for a speed up. And, at least from what we have seen during a first demonstration, the progress is simply stunning.
TG Daily - Photoshop to get GPU and physics acceleration