re: After 70mm IMAX, what’s the best format to see Oppenheimer?

Non-IMAX 70mm will have the same aspect ratio as a standard DCP (it’s the screen, not the format). Lie-Max Laser is the best compromise in that department. Also, it’s not necessarily true that film is superior in terms of resolution and brightness. Lie Max is easily brighter because the screen is both smaller and the lasers are brighter than the bulbs of standard projection. While the most information is technically present on the 70mm celluloid strip, the stability and brightness of digital projection tends to give the impression that DCPs are resolving more; also film prints vary from print to print in terms of color and quality, but there is a certain aura that some viewers may find desirable since you’re seeing something truly 1 of a kind (this is what is being romanticized by Nolan and others). But many DPs prefer their work, even those they shoot on celluloid, to be screened DCP because of its reliability (Deakins finds the idea of film projection comical)