The laser analogy is definitely accurate given today's technology. I just don't think they'll be able to productize something that has that high of an antenna gain. I'm really hoping and thinking that we'll see some smart antenna advances.
A quick google suggests I might still be fine. Its advertised as "in the same room" so it will probably punch through a thin non-stone wall.
> non-stone wall
Drywall is made of stone.
Drywall impedes RF signals much less than stone.
A sheet of paper will block the signal, so it probably won't go through that wall.