Eric Ho watches the boom on the Lower East Side...and sees...Detroit. Specifically...vacant storefronts — more than 200 of them in the area east of the Bowery and south of 14th Street.
How was it possible, he thought, that in a neighborhood where space was at such a premium, so much of it was sitting idle? ...an architect who once intended to design housing for disaster zones,, he thought: What could be done with them? — New York Times

Built on a temporary site and made entirely from recycled shipping containers, London's latest retail park lays claim to be the world's first ever "pop-up" shopping mall. The aptly-named "Boxpark" opened for business today along a vacant strip of east London's fashionable Shoreditch High Street. It is composed of 60 standard-size shipping containers, stacked two stories high and five rows wide. — cnn.com