You wouldn't get any of the effects of blurred vision, crossed eyes, or some such. Also, eyes are far better cameras than anything you'd fit on a helmet.
In some ways. If you recorded just what the rods and cones detected, you'd actually get a really small, really high-resolution area in the center (the fovea) with the rest at extremely much lower resolution. So if you recorded what the quarterback saw, but without the post-processing done by the brain to cache some of the things recently glanced at, it might be pretty hard to watch.
