The Short Version
Jon Favreau used Apple's Vision Pro as a portable IMAX theater on the set of *The Mandalorian and Grogu*, previewing full-ratio shots via custom software built for its micro-OLED displays.
A $3,500 headset replacing $100,000 worth of cinema gear is a real result, not a concept video. But so far, only one director is actually using it this way. Apple has proof of concept. Hollywood has not bought in yet. Those are two very different things.