Is that a render of what they’re planning? That mic button doesn’t look like a switch. It looks like a momentary button. I’d want something that has two distinct positions to confirm it is physically disconnecting some wire, as opposed to a button that may control an electronic relay.
Those are fun! I went to 4 or 5 of the Harry potter movies in concert. It’s a fun way to re-watch older movies on a projector above, while having an amazing live orchestra play through the whole movie. It’s really cool that the orchestra director can follow along with the electronic karaoke-like metrenome and keep everyone in sync with the movie the entire time.