Tesla alone plans to be producing 500,000 electric cars by 2020. and then go up from there.
http://www.forbes.com/sites/markrogowsky/2014/02/26/tesla-5b-gigafactory-bombshell-500000-cars-by-2020/
The most important thing about Tesla however, is not so much Tesla as what they are doing to the entire automobile industry.
The chinese for example plan to have their own gigafactory open by 2020.http://www.ibtimes.com/chinese-gigafactory-byd-says-it-could-have-battery-production-capacity-roughly-equal-1847002
Forbes in 2013 estimated that Worldwide Electric Vehicle Sales to Reach 3.8 Million Annually by 2020
http://www.forbes.com/sites/tjmccue/2013/01/03/worldwide-electric-vehicle-sales-to-reach-3-8-million-annually-by-2020/
Will Tesla cars be produced mostly here? See my Comment #74.
Overly optimistic projections. I'll believe it when I see it. More than five years ago in 2009, my liberal brother-in-law argued with me at a family gathering that there would be no more gasoline powered cars within five years, that electric vehicles would take over and be everywhere. I told him to put his money where his mouth was, and made a $100 bet on it. Five years passed, and he welshed on the bet, claiming dementia. I should have put the bet in writing. He's lost money on investments in solar panels and other so-called sure things.