A few years ago I read "The Sun, The Internet and the Genome" by Freeman Dyson. It is short, insightful look at how current technological developments will shape our short-term future. He is not making wild sci-fi type predictions but looking at realistic developments that are already in the works. Here is a WIRED article about some new manufacturing techniques for solar cells. It looks like some of Dyson's thoughts on Solar power are coming to fruition.