^ I can see Comet doing a lot better in London actually. With all its quirks and anachronisms that gave it the Broadway cult following, I can see the West End flocking to this. Maybe not the best example but think Starlight Express -- loud, quirky, immersive, and costly... flop in the US but record breaking in London.
I can also see this having a much easier time touring than almost any other show. The production has gone through so many different setups, seating charts, and capacities, that the show is adaptive to any environment its placed. If not proscenium style, all you need is a big enclosed space, an expo center, restaurant, or a ball room better yet, some ramps and risers, and it's pop-up Comet.
If nothing else, I hope Comet's contribution to Broadway will inspire many more shows to be told in such an immersive way, where you're walking onto the set of the show instead of watching it like a movie screen.