While they might look funny, strange, or even ugly to some, I have to wonder how soon we might start seeing these designs implemented. Fuel costs are becoming a major issue to the airline industry, if these airframes can be built for the same price as existing ones, Boeing will be all over this. Fuel economy is definitely becoming an important part of the game, also consider that if the aircraft uses less fuel it produces less emissions. Another attractive sales angle in today's society.
So we could see these in as little as ten years.