2. A "more social" experience of the movie is better. It's not for those of us who are introverts. Having people talking and eating all around deprives us of our ability to really enjoy the movie and be completely immersed in the experience.
I completely disagree about the introvert thing.
I'm an introvert, but personally, I rarely want to watch a movie alone. I like to watch movie either with a partner (usually a romantic partner), or with a small group of friends.
However, in both these cases (or for watching it alone too, making it 3 cases), the home-theater is the best choice, by far:
For watching alone, you can be undistracted by others.
For watching with a romantic partner, you can be undistracted by others and cuddle all you want (can't do that in theater seats, there's a divider in the way).
For watching with a group of friends, it's more fun at someone's home where you can have a nice couch/sectional, serve food and drinks, talk to each other about the movie if you need to (and then rewind so you don't miss anything), pause if someone needs a bathroom break or wants to go make some popcorn, etc.
There simply isn't any case I can think of where going to a theater is really that much better than staying at home. So, back to your point about introverts, even for the social experience, watching a movie at home is a superior experience. If I'm with a group of friends and we want to pause the movie and talk about it, you can do that at home, but you can't in a theater. At home, you can limit the social interaction to your preferred companions, and then do whatever that group wants, unlike a theater where you're stuck in there with dozens of other strangers and subject to the rules of the establishment. So yes, for non-social watching, home is better, but for social watching, it's also better.