It's been over 20 years since I went to a theater...but price is only one part of the issue.
Often, films are made with the music too loud and the dialogue too muted. DVDs have closed captioning. Need I say more about that..........?
Control of the film - with a DVD I decide when I watch it, and when I pause it. I go back to check on an earlier scene, or fast-forward through nonsense should I prefer.
Atmosphere - at home, whether settled in alone or entertaining friends, few theaters, with phones ringing, people talking, babies crying, teenagers acting out, long lines, etc., can compete with the harmony of a home.
Add in high ticket and refreshment prices, and you have to wonder how theaters stay in business at all?