Crickets.
There is no new boundary except for the one puritans dream up. A holographic projection of their own inner monologue on the topic, if you will. ;)
It's all just so painfully dumb, and we have to weather the same arguments literally every time there's a new content format.
So uh, can't people already do this with phones? I could watch porn on the train in front of people right now?
What NEW boundary does AR violate?