Actually I don't think we agree.
My problem with Cinerama isn't that it's inconvenient for wheelchair people, but that the people behind them get their views blocked. The solution is to create wheelchair spots where they're on the same plane as everyone else. The middle of the theater is fine. I agree that they shouldn't be all in front as they are in some theaters.
Captions are fine on foreign movies because they're necessary, but that would be extremely distracting for movies in English. Technology might solve your problem though: We currently have eyeglasses that can show TV, computer screens, etc., which look like they're right in front of you. How about eyeglasses that show captions? You'd see the movie normally except for the words.
Fundamentally, I don't agree that we should go beyond ADA and reorganize more aspects of life to make things equal for people with various handicaps. ADA handles the biggest aspects already. There are probably additional areas we can agree on.
But I wouldn't go all-out. With captions, how long before people with vision problems demand larger type (and how could they be denied)? Should we mandate no-perfume areas for the allergic -- and not just in one place, but in every section of the theater? Should movie makers be forced to provide scripts in braille for the deaf+blind? Should plays and operas be required to translate into sign language? Should daily newspapers be required to produce braille editions, not later, but by 6:00 am?