Let's not forget the fuel
Let's not forget the fuel cost savings, way lower maintenance fees and potential subsidies. With the 40% battery price drop, the EV's retail price would be very close to those of gas cars. Factor in a few thousand $ per year in the savings I mentioned above and there's not even a competition on the cost basis. No breakthroughs necessary, just a steady progress (it is true that batteries do not follow Moore's law but even though they improve at a swifter pace than gasoline cars' efficiency).
This further proves predictions of EVs disrupting the overall market in the foreseeable future (to reword your conclusion).