That Tesla is hugely impressive but I'm not sure on Elon Musk.... Can he follow through on what he claims? Who knows, a lot of industry talk seems to think Tesla will go out of business soon. Having been in a P100D though I can honestly say I'd buy one!
For my own thoughts...Electric cars are just a stop gap, hydrogen fuel cells driving electric motors are the real future of motoring. Its the most abundant chemical substance in the universe and produces nothing but water as a waste product. Plus you can drive home and plug your house into your car and run the house from the cars on board power station.
I've owned/driven an electric vehicle and am about to get a Golf GTE on a 8 week demo, they are fantastic bits of kit, so quiet and smooth but they are not the the future. My old EV Kangoo van had a claimed range of 100 miles but I would get through that in about 50 miles.
I'm looking forward to getting the Golf to see how the technology has progressed, the Kangoo was a MY2013 and battery/electric cars we're in the infancy back then so it will be interesting to see how far they have progressed in the last 4 years.