I think it's interesting, although I'm not sure about the city losing most of it's skyscrapers! Especially with all the new ones that have been built in recent years!
I know the plan implies that skyscrapers will no longer be viable, and most will be demolished in the next century, but it seems more like that they will be replaced with newer skyscrapers!
Any way, here's a link to the website about the plan
http://afterburnham.com/
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