Even the overclockable versions of the Catleap are hard to get to 3D status; and highly unlikely to be actually useable at 3D settings even if they do.
As far as we can tell, you require a GTX 680 if you want to get above 100hz at 1440p; at least one person has done 120hz at 1080p. Even if you have a GTX 680, you are not garunteed 120hz; mine caps out at 116 hz. Finally, the response times of the pixels as I've tested with PixPerAn, although not definitive, suggest that you'd experience too much cross-talk for useable 3D. Seems the pixel response times are just a hair too slow, with some of the transitions being at or slightly above the required 8.3ms response times.
Oh, and you can only do single card 120hz; seems that going SLI caps your refresh at 100 hz.
That being said, passive 1440p might very well be the future; with the increased vertical resolution, you won't notice the halving of the vertical resolution as much. But none are on the market as of yet...