I think the tricky part is if they start cranking up the intensity to counter it being scanned sequentially over a larger area...

First, what is the fail-safe in case the scanning mechanism fails? I.e. is the intensity safe if the beam becomes stationary? Or does it guarantee it goes dark when not properly scanning?

Second, what is the safe intensity limit for the brief visits to each target pixel area? As the scanned area increases, you need higher intensity to maintain the same visual brightness with a shorter exposure for any one spot. At some limit, is the pixel to area ratio too low and this intensity too great?

Third, does the optical path through the cornea and lens have any hot-spot where you have to also worry about peak flux with this projection technique?