Net Zero Living
~ The future of habitation for most people will not be a 3,000 square foot (or larger) home in the suburbs with several cars poised for any and all trips out of the manse. It will probably be something much smaller, with integrated energy and waste systems. Perhaps, closer to this:
A key design concept behind the Cube was that all materials and construction choices should be scalable, so that larger versions could be built. I would think modularity would also be useful goal, although that isn't stated.
In the market for smaller digs? They're available.