Many of us think Meta is trying to gain as much market as they can early, so they can leverage eye tracking and mm wave tech for very invasive biometric collection and ad targeting in the future. Reasonable minds can disagree on that.
It could be a gambit to track your eyes but that seems even harder with worse reward than taking a 30% cut as the next App Store.
No these are the same thing. Tracking pupil response to stimuli tells advertisers how a human is reacting to what they see. It lets Meta sell a platform to advertisers where they can target humans in particular emotional states, or at certain times when that individual is more likely to make a purchase.