When Samsung unveiled the Galaxy S III last year, one of the smartphone's killer features was its Smart Stay eye tracking function. When active, Smart Stay could determine if you were reading onscreen text and keep the display from entering sleep mode. With the S4, however, Samsung may just trump that feature. According to NYTimes.com,
the Galaxy S4 will come with a new Samsung Eye Scroll mode, which will track your eye movement and, when your eyes reach the bottom of the screen, automatically scroll down to reveal more readable text.