When I first heard of electric cars they were convert your car with lead acid batteries. An interesting project, but not practical. Then the EV1, but since I don't live in California I ignored it. Then Tesla which was neat, but I make 300 mile (one way) trips and the supercharger was still a promise - the price made it a "I could make it work if there was a supercharger along my way, but it is too expensive". Then came the leaf - affordable, but the range was such that I didn't have confidence I could go to work, lunch and get back home again. Now the leaf has solve the above, but I'm learning about battery life - it can work for the first 60,000 miles, but after that replace the battery at a high cost.
What will be the next goalpost? I don't know. The number one goalpost for me is always is it cheaper to replace my car or not. The reality is my current car is still working (though we will see what my mechanic says, there are some signs that the body is starting to fail), and at 40+mpg electric is not a better deal than keeping it working.
Every year they roll out more and more Superchargers, and the 100kwh battery for the Model S exists now.
1. "Across the United States, mega-commuters on average spend two hours to traverse 166 miles just for the lighter morning commute " http://www.mercurynews.com/2013/03/04/bay-area-tops-new-mega...
Pedantically, some would, since to be a mega-commuter you only need to travel 50 miles in each direction. Average != all.
This discussion has been had so many times, I can't blame people for downvoting it. Nothing new is going to come of having it again, it's just going to derail the thread.