well humans cant tell the difference anything over 30fps.... u may feel the difference in games because of its response, but humans cant really tell the difference anything avg. of 30.
You might not be able to distinguish between frames at 30fps, but you sure could detect the flicker. Esp. if that flicker is 180 degrees out of phase for each eye as it would be using 3D shutter glasses. I have an old ATI video card with the 3D shutter glasses, and can personally vouch for the fact that it causes headaches after a bit of use. Probably why it was never a big seller at the time..