(cont).
Volvo will have their first REAL EV out in 2019-20. VW, Daimler, and possibly Ford are looking at their first REAL out in 2020-22. In addition, they are just starting to add their own proprietary Superchargers, but again, are doing it the WRONG WAY. 
As such, the first real set of EVs from regular car makers will be around 2021-22 time frame. Yes, 4-5 years from now. LONG TIME.
And buyer will not want to buy their ICE vehicles during that time. Why? Because they know that resale on them will plummet. Would you buy a 35 or 70K car knowing that in 2 years, it will be worth below 10 or 15K, respectively? Likewise, buying Pontiac and Saturn was not a big deal. They share parts with Chevy, GMC, etc. BUT, once ICE production stops, parts will really start disappearing from the market OR will be EXPENSIVE. 
OTOH, by 2022, possibly 21, Tesla will almost certain be at 5-10M cars / year. JUST IN AMERICA.  Ppl will be tired of waiting for others to make GOOD EVs so will buy Tesla.