Klumpen0815: Doesn't look very effective to me, just some design stunt.
rtcvb32: Considering the shelves on the outside, the structure suggests it would sit inside an apartment along with 3-4 other ones with a sort of small community all renting one space.
Being a 10x10x10 seems like rather odd dimensions, and having plumbing and trying to be a complete house does seem a bit odd. I'd personally rather have wiring and no water/sewer/garbage; Although a spot for storing water or pouring from a spout would be okay.
Much better designs usually are those put on the back of trailers that don't require special permits to move. 230square foot houses are good examples, or that cardboard house i linked earlier.
The cube isn't meant to be a complete house on its own, it's meant to be inside an outer shell that provides actual living area. The bed, for example, is pulled out from under the TV shelf, and when pushed in is under the bathroom floor. The inside of the cube is the bathroom, the outside is various compartments and shelves.
"Homes" smaller than this, such as those Japanese rooms mentioned earlier in this thread, generally are little more than sleeping space and share cleaning, washing and cooking facilities between several homes.