Popular science just published an article on a startup company that has a vision of replacing all of our current roadways with solar panels. The panels would carry electricity, and also be the route for TV, Internet and any other wires companies needed to run coast to coast. The company is still in the process of getting things started but the gov't just supplied them with $100,000 to test out their idea. If widely adopted it would replace our need for any other source of energy and allow electric vehicle to plug in anywhere they drove, because every road would supply power.
Link to the article: PopSci Article
Link to their homepage: http://www.solarroadways.com/