Well, I don't think that 300 miles @ $70k + price is a game changer. It's a really nice car but the cost is out of most people's range, including mine, so I don't see Telsa as a game changer as that takes more than range alone.
What I would see as a game changer would be these kinds of milage from battery alone in a small commuter like the elio, without the cost of all of those batteries that run the price of the Telsa up to over 70K. If they can indeed be produced for 1/3 the cost of traditional EV batteries, and assuming the usual tossed around number that the EV's batteries add about $10k to the cost of the car, then if you take roughly $3,300. and add it to the elio's $6800 price you would have a $10k EV. I know the economics don't work out exactly like that, but just using rough estimates. Again, I cannot find the original article where I read that cost estimate (for the Preito battery).