Birdman, of course, rode the gimmick to a Best Picture win, and this year alone saw two very different (but both excellent) films– One Cut of the Dead and Long Day’s Journey Into Night— devote fully half their running time to a single, serpentine shot, both of which, according to press, are genuine.
In an undertaking like 1917, with its multiple locations, intricate action sequences, and effects shots, engineering a true one-take would be practically impossible, but here postproduction innovations have come to the rescue, allowing the filmmakers to suture together various long takes into a seemingly seamless whole (as did Bi Gan in his Long Day’s Journey Into Night).
By contrast, Gaspar Noé’s “Climax” and Bi Gan’s 3-D one-shot embedded in the last reel of “Long Day’s Journey Into Night” do achieve theatricality where "1917” fails.