The technique of speed reading (RSVP) on your smartwatch.
Rapid Serial Visual Presentation (RSVP) is a method used by most of the recent digital speed reading systems. Single words flash on the screen so you're concentrating on a single word at a time. As you get used to the system, you speed up how fast the display shows you words.
More information here:
http://lifehacker.com/the-truth-about-speed-reading-1542508398