Although this video did not mention people with disabilities, I looked at this and thought how much easier it would be for people with physical impairments to communicate and use the computer to its maximum potential by simply moving your eyes.
The EyeFollower by LC Technologies. The worlds most advanced remote eye tracker. This unit provides 14 times the level of free head movement, operates on 90% of the human population, and is accurate down to <.04 degrees.
Researcher analyzing what the user is looking at as they interact with a website.
The eyefollower. Accurate, reliable, and robust eye tracker