Apparently the next generation Galaxy (S4) will track your eyes as you read the screen. Once you get to the bottom of the screen, it will know that you are looking at the bottom, and automatically move the page down for you!
So what happens if I look at the bottom by mistake?? That could be really annoying if the page is jumping all over the place. I think this one might be overkill. Hope it works as good as the samsung Facial recognition unlock feature, which does not work at all oooooo! Just kidding, we love samsung at smile and mobile, but seriously guys, this one is kind of unnecessary!