I have an idea of improvisational theatre. Some examples are known of writers writing together, chapter by chapter in turn, without discussing a plot of their work. Why not to do the same, but applied to the theater?
Plays would be very simple, and not requiring a lot of properties, otherwise that were a mess. And my personal dream, just as I see it, is that the play takes place in the night and in the light of candles. Several actors meet and start playing their roles, creating them on the spot! Their actions, speeches, emotions would be as close to real life as possible!