As VFX and special effects take over the traditional filmmaking methods, Nolan is among the remaining few directors who still builds grandiose true-to-life sets and reflects cinematic setpieces by filming them instead of digitising them. Oppenheimer is thus a culmination of Nolan's cinematic genius combined with an incredible story that changed the world in more ways than one. It's incredibly intimate and divisive, with the onus of it's justification being put on the audience instead of the narrator.
The cast is just as incredible as you would expect it to be, and the screenplay flows naturally, with a breathtaking score that justifiably draws parallels from Hans Zimmer's profound work in Interstellar. Nolan balances the intimacy between the characters while simultaneously juxtaposing it with some of the most impactful scenes ever shown on the big screen. The movie's runtime takes it's time in setting up it's pieces, with the finale leaving you utterly spellbound at the sheer magnitude and scale of the events transpiring right in front of your eyes.
Lastly, for those who want their daily dosage of immediate dopamine and faster pacing in the theatre instead of experiencing a meticulously guided journey, you could wait a few more months for yet another copy paste Fast and Furious flick or a Marvel movie laden with green backdrops and fan-service.
Because this isn't a film or a flick, this is Cinema.