I'm still waiting for the perfect 3D screen before I pay the premium to get one. I wish someone would put out an interleaved passive screen at 1920x2160 with half-height pixels that is natively compatible with 3D Vision (and not terribly overpriced). That would only be 180-odd ppi in the vertical on a 24" screen, certainly not something that would be that difficult to engineer, and it would solve the issues of readability of small text in 3D mode and the striping you see in 2D mode.
Heck, subpixel font rendering wouldn't even be affected. If done right, there wouldn't be much of an argument to be made for 120Hz 3D screens.