I think its going to be a few major breakthroughs that someone not directly involved with them is going to figure out how to put it all together. I mean look at the car, it took internal combustions engines, assembly lines, machined universal parts, new ideas of welding and manufacturing to create an affordable mass producible product.

Wait for some investor to piece together 4 or 5 unrelated cutting edge technologies to find a fix for the energy problem. Helps to be a few steps removed to see the big picture.