The experts are saying the same about solar energy now. They note that after decades of development, solar power hardly supplies 1 percent of the world’s energy needs. They say that solar is inefficient, too expensive to install, and unreliable, and will fail without government subsidies. They too are wrong. Solar will be as ubiquitous as cellular phones are.
I see what he is trying to say, I just don't buy the "free" part. Energy will never be free, would fuck up the market.