Can honestly say I've been utterly unimpressed with Nvidia 3D vision whenever I've used it, it looks beautiful in the test demo, then when you run it in game everything is bland and barely more than flat. My 3DTV can convert stereoscopic to full screen, so I use the in game option instead when I want to try it out. Obviously comes with a fair degree of pixelisation, but the difference in 3D quality is astounding.
I'll be watching this thread with interest to see if anyone knows how to make 3DTV play worth the 20 odd quid they expect me to pay for it, because currently it's not worth ten pence.