Sauce- http://spectrum.ieee.org/tech-talk/consumer-electronics/gadgets/why-i-love-ces-tobii-and-steelseries-release-consumer-eye-tracker

Seems legit. Imagine controlling your turrets with your gaze. Or having an NPC get offended because you are staring at them. Coding support for this on an official level when the PU begins to take shape would not be hard, and could add a deep level of immersion. It's already functional and grants a player obvious advantages even with out any official integration. On a more basic level, for us joystick users, this is a much more accurate alternative and takes less concentration, how ever subtle, than a thumb stick. I, for one... will gladly accept any edge technology is willing to grant me to survive.


http://www.tobii.com/en/eye-experience/eyex/