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Why something as intuitive as eye tracking, but something as clunky as touchpad gestures?

Surely if technology is good enough to track the eye, we don't need a touchpad to track hand gestures?

I really like this concept, but when I heard "three finger scroll" I died a little inside.

Sadly, technology isn't good enough for eye tracking to completely replace the mouse. Your eye will always flutter a little and wander around, so you can't rely on eye tracking exclusively.

It's also not really practical to perform gestures with your eyes. So you'll still want a touchpad to have quick access to common features through these gestures.

I have actually researched this topic quite a lot, and have also been prototyping with a Tobii EyeX tracker.

I didn't mean to insinuate that technology is at a point where eye tracking excellent, I meant to play along with the video where it was a requirement of the new desktop that eye tracking be excellent.

Thus in this theoretical world where eye tracking is excellent, why is hand gesturing not as advanced as eye tracking?

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