On March 14, 2013, Samsung is going to take the stage in New York City and announce their newest flagship device within the Galaxy S lineup. That device is rumored to be the Galaxy S IV, which would fall in line with their set naming scheme. While rumors about the device's features have been swirling for a while now, this new rumor falls right in line with technology that Samsung already includes in devices like the Galaxy S III, and even the Galaxy Note II.
According to an unnamed Samsung employee speaking to The New York Times, Samsung is gearing up to include "eye scrolling functionality" in the Galaxy S IV. What that means, is that the device will be able to track your eye location on the screen, and scroll when your eyes find the bottom of a stretch of text. This means you won't have to touch the screen if you don't want to, as long as the functionality is activated.
It should be noted that Samsung has started to remove some of the necessity of the user to touch the display directly. In the Galaxy Note II, for example, the S Pen is able to scroll through pages without actually touching the page, just by hovering over the bottom of a page or list.
While nothing is confirmed quite yet, this particular rumor makes sense, based on what we've already seen from Samsung and their software. We don't have long to wait, so stay tuned.