@Anon

"It's tracking head movement, not eye movement. It won't be able to tell which portion of the screen you're looking at - just where your head is in relation to the screen. They're two entirely different things, and serve two entirely different functions."

From the article:

"The Taiwanese researchers have also claimed they are already working on improvements to the system by replacing the camera with an infra-red sensor that tracks a user’s eye movements instead"

Read first. Comment later.