I wouldn't be so glib to dismiss the solar roadway.  Materials Science research directed towards generating electricity either by sunlight or producing hydrogen has been yielding some rather astonishing results  https://phys.org/news/2017-06-solar-endless-energy-vapor.html
 This advent of converging technologies accelerates the transition to renewable energy and away from carbon based fuels. Energy mavens understand this and continue to expand their investment in green power (http://www.cnbc.com/2017/01/12/warren-buffett-bill-gates-are-investing-in-clean-energy-commentary.html             If it doesn't make money for these folks the rest is just noise. I suspect that the apologists for fossil fuels are only buying time for the large energy firms to position themselves at the top of the green energy food chain, they just don't know they're being used. We have decidedly exceeded Malcolm Gladwell's principle of the "tipping point", the past soon to be buried under an avalanche of change