The model 3 and S already have that range or more. You'll only get ~350km out of that at highway speeds though. The supercharger network makes it perfectly reasonable but it's not yet ideal. Other EVs tend to be far behind still. Most can't charge fast enough and even the ones that do don't have enough charging infrastructure in most places. We're getting very close to mass adoption but will still need 5-10 years more depending on location to get enough battery improvement and charging deployment to make it a no-brainer to get the EV over the pretty good plugin-hybrid models that exist right now.