it's not just to protect my privacy, it's just generally how I've come to think about consuming media in my house.
* a beamer gives you a viewing angle as wide as you'd want to have in a cinema (wider than this is uncomfortable).
* therefore immersion in movies and games is about the strongest you can have for non-VR content in your home.
* cinema is (a) rarely showing what I want anymore and (b) incovenient now that we've got a small kid, so this solves that as well.
* a beamer on a cart is mobile - sometimes I just roll it to the end of our bed, lie down and play Zelda or whatever for half an hour to relax a bit.
* beamers are mostly still dumb, so there's not much to break that I cannot fix and not much to annoy me, like "go online to get the full experience (and our ads)" and all that crap.
* when we're done the beamer can be rolled out of sight, so you don't have a giant black hole in the middle of your living room, constantly telling you you should probably do something with it to make it worthwhile.
* setting up the beamer is a bit of an act, and that's good, so we do it about once every week and have enough activities in our life other than passive media viewing. with the cart it's still quick enough to not be very inconvenient, I can just plug in one power cable and push a couple of buttons and it's done.