eye tracking reminds me the film "Looker" from Michael Crichton ..... this guy was a genius ... (imagine advertising efficiency analysis with Apple Vision Pro cooked in the Google sauce : pretty uncomfortable, uh ? ).
Paraphrasing Steve Jobs : the best pointing device : your eyes !
"It's in Apple's DNA that technology alone is not enough. That it's technology married with liberal arts, married with the humanities, that yields us the result that makes our hearts sing."
Sometimes I have nightmares about a parallel universe where Apple does not exist, and Microsoft dominates the smartphones market (with physical keyboards, of course !)