Even if services that offer same-day movie screening as they hit cinemas arrive, I would rather go to a theatre and watch it on the big screen.
So would I. That's why I got a projector.
The actual viewing field is not as big as a (real) iMAX screen, but it's bigger than many smaller theaters, especially when you try to sit back in the middle of the theater.
The sounds system at home is arguably better even with cheap speakers because I can tailor it to hear more details instead of just going for OMG LOUD. As long as you have a subwoofer, close enough.
The only aspect of the theater experience I can't really replicate at the moment is 3D, which is only because something between the PS4, projector, receiver, and the 3D glasses I bought simply does not work and the 3D flickers on and off. But I'm sure if you put more thought to all the components of the system before you bought you could have a home 3D experience that worked quite well.
I do have tickets for RogueOne in a real theater on opening day, but that's really because I don't want to have to avoid spoilers after that day. If I could pay to watch it at home on release day (which I'm pretty sure would cost less or at least about the same than the $19 I paid for my own ticket) I'm pretty sure I would do that - especially since I'd probably be able to watch it a few times.
Watching a movie, in my opinion, isn't just about watching the movie. It's the experience, something I feel I wouldn't be able to replicate on my smartphone or TV at home.
Well you could always put up flyers around downtown and nurseries inviting homeless and children in your area to come to your house for the evening. You could also go to Target, buy some candy then leave your wallet in the parking lot.