Sonys virtual reality headset already stacks up nicely against the Oculus Rift, but the company could also have a secret weapon. Last year, Sony revealed it was working on technology to let you control games with your eyes — technology that we just tried here at the 2014 Game Developers Conference. The same Sony team behind the Project Morpheus VR headset, the PlayStation Move, and the PlayStation Camera are also showing off a modified version of Infamous: Second Son where your eyes control where your character is looking. There are plenty of caveats, of course, like how difficult it is to keep the camera still and take in a scene, and how long it takes to quickly turn 180 degrees, but Sonys demo let us use a DualShock controller and eye-tracking simultaneously. Theres also the matter of size and cost, as the depth camera used here is Kinect-sized and designed for professional use.