There's currently a post a user made on here because they were able to notice the flicker in a flash on their cell phone, which probably was at a few thousand hertz. If we can notice that, what are we really missing as far as motion fidelity goes? Look out a window watch something at a distance and have a bird cross your field of view at a close range. We can't analyze frame for frame, but we CAN see time based visual elements of hundreds or thousands of hertz.