Apparently when Elon Musk was talking last week at the Cleantech Investors Summit, the Tesla CEO's prognosticating extended far past 2015. He reiterated that there's a an electric Model X SUV coming soon and a sub-$30k Tesla within four years. However, in 20 years Mr. Musk thinks that everything will be EV -- well, everything in the US, anyway. He believes that every car sold in America in 2030 will be electric and that within a few decades after that they'll take over worldwide. Of course, this is someone who believes he'll be living on Mars in 2030, naturally sent thither astride one of his