Are you the Stare Master?
Can you outstare an Emu?
Thats not important, what is important is can you outstare the Stare Test!
The Stare Test makes use of openCV machine vision to detect your face and track your eyes as you stare. This might be a game, but it is also a demonstration of underlying technology that can be used in many areas (and have been by many people already). Works best in good light.