A lot of "IMAX" theaters (and movies) are digital...but not those films created by Christopher Nolan. I love his movies, but he's an analog snob and believes the only legitimate place to enjoy his analog tech films is in a theater. I'm not saying he's entirely wrong, 70mm IMAX is probably the best film experience out there. But it's an ideal many moviegoers can't enjoy.
To be fair, he recently said that 70mm IMAX format is also ideal as master for any downstream format, because all the information you're ever going to have for that movie is in the negative. And with the length (and therefore the size) of the movie, he acknowledges he may at last have reached the limits of analog film technology.
>he's an analog snob and believes the only legitimate place to enjoy his analog tech films is in a theater
He is like that in interviews, but it's worth noting that a lot of care is put into making great digital versions of his movies too. I'm not familiar with how involved he is in that process, but I would hazard a guess he's pretty involved.
The Oppenheimer site mentions this:
The Digital Cinema presentation of OPPENHEIMER has been created from 8k scans of the photochemically color-graded film elements, scaled to 4K, fine-tuned in the digital realm to maximize the color and contrast attributes of digital projectors, and dust-busted to achieve the cleanest and most stable image presentation possible. The film was finished in 4k for the highest digital resolution currently available.
To be fair, he recently said that 70mm IMAX format is also ideal as master for any downstream format, because all the information you're ever going to have for that movie is in the negative. And with the length (and therefore the size) of the movie, he acknowledges he may at last have reached the limits of analog film technology.