I think when history takes the long view of early 21st Century Broadway real estate strategies, the notable observation will be that landlords have found silk purses for some of their sow's ears. I'd add the Gershwin to that and perhaps the Lyric although I think not. The Marquis (to me the worst of the worst) will have to wait for some other era. I always thought it would be great as an indoor driving range.
Re what is waiting in the wings, I don't think we can prognosticate quite yet. As I have said elsewhere, I think we may clean house of the tourist shows. I have also said (maybe not here) that I think we may like the new normal (not just in the theatre but in the city overall) better than the old one. But I am an optimist, and yesterday I read an article that said that optimists live two years longer than pessimists.