Today I read this article
A Primer: Electric Car Competition For Tesla 2017-2020 - Tesla Motors (NASDAQ:TSLA) | Seeking Alpha about tesla's coming competition in the following years.
Why will Tesla win the battle vs all the other giant car companies in the EV sector?
Oh, well, in the very long run, 100 years plus, they won't, of course. (Look at the history of Ford and GM!) The question is, how long is the long run?
First, all ICE cars have to disappear. There is no "electric car market"; there is a "car market" and ICE cars are inferior to electric cars, purchased only because they are cheaper.
So until all the electric car competitors are producing enough to satisfy the global car market -- roughly 80 million per year -- they aren't really competing with each other.
After that... well, Tesla already has a lead, because Tesla has a Supercharger network and they don't. So they have to build that.
At that point, we'll probably settle down to a world with multiple car companies. Tesla will be one of them. Tesla now has a strong brand name so they will be able to sell cars profitably on that for many years to come even if they do fall behind technologically (look at the history of GM!)
Right now Tesla has a gigantic lead. I believe we will have a lot of warnings and evidence when Tesla's lead disappears, and we will certainly know when the ICE car market disappears. At that point, TSLA might turn out to be overpriced. But I'll worry about that when we get within three years of it, and I strongly believe that we aren't there yet.