I'm not entirely sure how a folding balcony is superior to one that doesn't fold, considering you're not really saving interior space, and presumably there's sufficient space on the outside to expand out the balcony. Still, the award-winning Bloomframe by Hofman Dujardin Architects is rather cool. Bloomframe balconies can be added to existing buildings or made part of the design of new buildings, and are basically innovative window frames that can be pushed out to form an exterior balconies, expanding your interior space to the outdoors.

Via Smart Stuff.