You can view the page at http://forums.pinstack.com/content.p...rack-Your-Eyes
The tech is already there - On the S 3 there is a setting that will leave the screen lit while you are looking at it. Look away, the screen goes dark, but if you keep staring at it it stays lit. It uses the front-facing camera.
And it´s quite handy as well. I can imagine how good it can be if it scrolls...Wow!
This is going to be great when my hands are tied behind my back and I want to check my phone.