While some alleged Galaxy S IV screenshots leaked with some strange inconsistencies, there is another leak of a Galaxy S III 4.2 ROM with the same feature, Smart scroll. Except these screenshots show more detail of the feature, which seems to be very customizable. I like where this is going, as Samsung added a lot of options for tinkerers. There is also something called Smart pause, which will pause the video you’re watching if you look away.
The feature will scroll down for you when it senses your eyes at the end of the page. So you can keep reading without having to scroll. And instead of being a purely proprietary feature, it’ll work with both Gmail and Google Chrome. It should be interesting to play with once it launches on the S IV and comes to the S III (and presumably the Note II eventually).