The military (airforce specifically) also has a nifty device that's in a similar tech area of that visor technology. It's a neuralmagnetic sensor band that a pilot puts around their head. Using thought they can pilot an aircraft in any direction with the band on their head. It's nifty, but with it tweaked and improved it may be possible to just tap into the brain's magnetic field. Imagine a full VR game with sensory ability, and all you do is just put on a hat.