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I worked in a 3d graphics research lab. It seems some of the issues the video is indirectly addressing (pointing at the screen without touching for "cursor") ar

I worked in a 3d graphics research lab. It seems some of the issues the video is indirectly addressing (pointing at the screen without touching for "cursor") are still tricky. The accuracy is still not there close up, is it? We have eye trackers in helicopters, but without a laser/styli, me pointing at a screen is not that accurate without a lot of (probably still today) expensive gear. I do agree, show people this today with modern screens and they might get excited. I can see some real use cases. A classroom or presentation setting for example.

hnuser123456 4y ago
In VR, the controller can be a laser pointer/cursor with very high precision and reliability (if your tracking setup is optimal), many VR menus use this mechanic. But then you're wearing VR controllers and a headset, and only you can see the screen unless it's mirrored to a real screen or you're with others in VR.