A 10+ meter screen plus great sound.
A chance to get out of the fucking couch/house.
Getting to see a movie along with lots of other people (the mere fact of sharing the experience with a whole audience is important to a lot of people and a frequently written about part of the cinema experience, even though some people --introverts, touchy etc-- can't stand others next to them).
I'm sure there were people who insisted on using horse driven carriages, long after automobiles took over. "It's just the proper, cultured thing to do. And you can tip your hat to other passing carriages! The shared feeling!"
Although note that sentimental items can have a value of their own. Cinemas could perhaps even increase the ticket price dramatically in that world, making it a "luxury item" on purpose. "Tell her the depth of your feelings with a real cinema ticket". Remember diamonds?
Where the headphones would make the talking-to-others impossible again.
> or, if you're dedicated, with speakers around the room.
Not to mention the HD projector/4K television, dedicated windowless room, comfy chairs, etc...
The point being that, yes, with enough time, money and effort you can of course build yourself a miniature cinema inside your home. But the idea of cinemas is that you don't need any of that to enjoy a movie in exceptional quality.
I live in a city apartment and have neither the physical space nor the dedication to get myself a professional-grade entertainment system. Does this mean I don't care about image details or sound quality? Of course not.
The social components of going to a cinema shouldn't be underestimated either. Watching a film in a crowd is a different experience than watching it with close friends at home - visit any midnight premiere of a movie with a decent fanbase if you need proof.
Depending on who you go there with, it can also be more than just the movie and be a part of going out in the evening.
The disruption seems like a loss of quality to me, where everyone except the rich or very dedicated would have to do with a significantly reduced experience tgan what is available today.
I'm not big into movies and I don't care for the cinema "experience" at all but I do like to get out of the house once in a [great] while to see a movie with friends. The actual movie we go see isn't too important to me as long as it isn't terrible.