The DC area used to have two IMAX theaters with film projectors: one at the Natural History museum, and one at the Air & Space museum.

The one at Natural History lost tons of money. They eventually took it out, sold it for parts, and replaced it with offices and a cafe (which does make money).

They kept the theater at Air & Space, but converted it to IMAX digital. As a result, they are able to easily show pretty much any first-run movie, as well as revivals. That helps them sell a lot more tickets.

The real essential difference in IMAX is the physical shape of the theater. A real IMAX theater has very steep seats that are close to an absolutely huge screen, with huge speakers behind it. As opposed to the “IMAX” found in cineplexes where they just took their largest theater and upgraded the projector.

Films really should be shot differently for IMAX. Closeups need to be a lot less close up. People shouldn’t have to turn their heads side to side just to see one or the other eye of your character. IMO it’s a mixed result in The Odyssey. Directors just can’t resist closeups of actors. And the movie needs to work in regular theaters where most people will see it.