I got a $600 projector and have about 90 inch display ( can hit 120 if my apartment was bigger). No need to go to a cinema, overpay for drinks and snacks, and I can pause and pee whenever I want.
I have a very good setup at home but we still like going to the cinema once in a while, it's more of an event and we don't spend the movie with our nose in our phones.
We do select movies where it's worth it, big action, etc. Last one was the new avatar in "4D" where they splash you with sprays, the seats move and you feel the wind, pretty cool.