There was a great TED Talk by Elon Musk. He says every new product needs to go through at least 3 iterations before becoming mass market, and Tesla is currently

There was a great TED Talk by Elon Musk. He says every new product needs to go through at least 3 iterations before becoming mass market, and Tesla is currently at iteration 2. http://www.ted.com/talks/elon_musk_the_mind_behind_tesla_spacex_solarcity.html http://www.ted.com/talks/elon_musk_the_mind_behind_tesla_spa...