Kind of off topic but semi-related, I couldn't help but think of how magical it would be to see some other Sondheim shows done in that immersive type of atmosphere. I imagined walking into the Barrow St. performance space covered in trees and grass, the audience seated on tree stumps and whatnot... with an immersive Into the Woods, or something of the sort.
Might not work, just thought it would be pretty neat.