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 ne

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?