Sure, there's a lot of prefab housing on display at MoMA right now, but have you seen any of the modular structures inhabited in New York? Design*Sponge points out a Kithaus in Williamsburg, whose "location required each module to be carried, by hand, through a 3 story brick rowhouse. The builders then added custom decks and wedged it in between warehouses and light industrial buildings to create this compact urban oasis." Prepare to be jealous......