Perfect simulations? So Laplace's Demon? I suppose it would be most useful in doing a little bit of viewing the future. If you could call that useful. The existence of Laplace's Demon basically disproves "free will" and anything viewed in the future would be set in stone and unavoidable. HOWEVER it could also potentially be used as a remote viewing device for any events that have already happened. Period. Yeah let's see what the dinosaurs actually looked like. Sure we can take a firsthand look at the originating events of any major religion. Yep we can literally view any major crime exactly as it happened.
Depending on who has access to it, personal privacy becomes literally nonexistent.
Don't see how his use would violate that?
Think of it like a portable hotel room with no bathroom. You can travel wherever while outside the room and when it's time to turn in you just use the room.
He's also saying that he would not need to commute as in his home is close to work without having to worry about the high rent in the area where his work is.