I heard the GeForce FX was kind of a disappointment. I certainly haven't seen anything hard (outside of the NV30 videos) to back up opinions either way.
Well, I guess we'll have to see if the card kicks ass or not. Regardless of its ass-kickage, expect Apple to cut a deal with nVIDIA to include the damn thing in their G4s by the time the FX is just starting to roll out.