Tesla's deal with Panasonic [1] should bring their costs down by a hefty margin. Current battery tech is improving at around 7% per year. So even without a true

Tesla's deal with Panasonic [1] should bring their costs down by a hefty margin. Current battery tech is improving at around 7% per year. So even without a true "order of magnitude" breakthrough like lithium-air batteries, you're looking at battery efficiency doubling every decade, plus additional savings from economies of scale. My personal suspicion is that electric cars will hit mainstream sales levels by around 2020 and by 2025 they'll dominate new car sales. [1] http://www.forbes.com/sites/markrogowsky/2013/11/06/teslas-big-earnings-news-nothing-can-rid-the-world-of-gas-powered-cars-very-quickly-but-its-going-to-try/ http://www.forbes.com/sites/markrogowsky/2013/11/06/teslas-b...