This is a concept project that's on its way to real reality. I say real reality because not only are there hopes to turn this project into a reality, there's money moving towards that end. In Germany, this "Plus-Energy" house is designed by Institute for Lightweight Structures and Conceptual Design (ILEK), headed by Werner Sobek (who succeeded the great Frei Otto, a master of lightweight structures.) - thanks for the info, TreeHugger. There's a bit of credibility right there that lends itself toward thinking this is a project on its way toward the real world. What is it? Why, it's a square house completely covered in photovoltaic panels and solar thermal systems that generate electricity and hot water.
What else would it be?