I think is the biggest problem for a plan like that in NYC and anywhere really. There's just nowhere to move these thousands of people, and even if there were, they wouldn't go. There's so much distrust (not without reason), that would prevent this. Think about how it went the last time they did this? And truthfully, the dense neighborhoods were replaced with much less dense, but now overcrowded ones. The whole thing was a recipe for disaster, but this came from the same group of people who felt everyone could have a car (when simple back of the envelope calculations suggest that the entire surface area of manhattan would be needed for parking alone).Residents are moved to other social housing projects.