It is, I can confirm, cool technology; I visited with Tobii earlier this month at the CeBIT trade show in Hanover, Germany. The technology is used commercially now for testing advertising; it also has applications for PC controls for the disabled. The technology so far is way too expensive for broad adoption, alas.
I tried out the technology, and was able to do things like flip through a set of pictures or navigate through software applications simply by changing my focus on the screen. At CeBIT, the company also demonstrated two versions of its EyeAsteroids arcade game - the world's first eye-controlled arcade game. The latest version is not only eye-controlled, but also in 3D.