If the question asked had been "will solar power dominate in 5-years" I would have said no. But, I believe that we'll discover cheaper and more efficient methods of producing solar panels and collectors in the next 15-years. Before 1932 when the neutron was discovered, no one dreamed of nuclear power. In 1954 the first nuclear power plant went online, just 22-years later, and without any computers to facilitate the development curve.

Technology is accelerating at an unprecedented rate. I have no doubt that we'll be have the technology to produce more than half of our power from renewable sources in less than 15-years. The problem that exists is the infrastructure lag. While we may have the technology, it may take another 10-years before the technology has a chance to reach a large segment of the public.