Wow - so many shows are closing within a short period of time:
Little Shop of Horrors
Boy From Oz
Caroline or Change
Aida
And about the shows supported by the tourists:
Of course, it may not be often that a tourist comes into NYC, so they are going to want to see a flashy show that "wows" them, such as Lion King, Wicked and Hairspray. It is easier for someone who lives in the city to go to any show they want to, while for a tourist it may be a rare opportunity, so they are going to want to see the shows that have been receiving much acclaim. Look at it from the point of view from a tourist who may never have another chance for a while to make it into the city.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611