I will echo what others have said, but 'Oppenheimer' may be the most important movie ever made. Thankfully it's also one of the best, with perfect casting, sound design, performances, score, and pacing. This is Chris Nolan at his absolute finest, delivering an epic masterpiece that should arguably go down as the movie of the millennium. Note that this is a thinker's film, so if you're looking to turn your brain off for mindless entertainment, go watch Meg 2 or something. Seeing Oppenheimer in IMAX does enrich the experience, though I do look forward to watching it again with subtitles, in order to fully appreciate the brilliant, fast-paced dialogue. This is an easy 10/10 and a generational piece that everyone should watch at one time or another.