Nih, the thing is your (like most) only putting the V5 under one set of conditions, those of a First Person Shooter. Believe it or not, there are alot of people who play driving and flight sims, 3d strategy games like Homeworld, etc. In these games you can run FSAA with an acceptable hit.
Also, there are still some people out there with crappy monitors (like myself). I can only run 800x600 at an acceptable refresh rate for my eyes. From what I have read, 800x600 w/ FSAA 2X is very pretty.
Another thing to consider is that the V5 with recent driver releases is creeping up on a GF2 GTS scores in FPS games. I don't think it will ever surpass the GTS, but it is in the ballpark. Add to that excellent 2d quality, the least performance hit and reportedly best image quality for FSAA, and you have a very competitive card.
I personally decided on a Radeon anyway because its specs lined up more with what I wanted. So just because the V5 doesn't line up with what you look for in a video card, doesn't mean there aren't people out there who want what the V5 has.