"Wanna play a game? Just move the ball to the hole with your eyes. Oh and we need access to your camera."

“Please drink verification can”

Boy, I love to see an r/lol reference on HN. Gotta be a lot of crossover, right?

There is a short part of this in Black Mirror episode: Fifteen Million Merits.

To earn credits you must look at an ad-video, but when he looks away the video stops and makes a crazy sound so you'll continue to watch the ad...

I wonder. Obviously its technologically possible, but would average user accept it?

It is both possible and being pursued actively. I believe the average user will accept it. The average user has an uncovered camera on the computer and almost everyone has an uncovered camera on the phone. Requiring a cookie banner notification did nothing but make it more annoying to use websites, with less accountability on the site administrator for all the questionable actions they can freely undertake, now with your consent! But it goes far beyond that - there will be cameras embedded in digital billboards/posters you walk past that track your gaze and provide targeted ads based on either facial ID or device ID, the ad effectively learning who you are through your leaky apps or always-on bluetooth.