In my experience in this industry they often have multiple (2-3) projectors in the projection booth for exactly this kind of issue, a bulb goes out, etc. They

In my experience in this industry they often have multiple (2-3) projectors in the projection booth for exactly this kind of issue, a bulb goes out, etc. They also play the previews and ads before the movie on a different, cheaper projector. Having 2 Sony projectors wouldn't help here though...