you leave out alot of numbers in your posts and your math. My electric bill is sky high for very little due to all the extra charges involved. Even if I were to use NO electricity in a given month, it would still cost me $60.
I spend about $75 a month for my 50 mile per day commute in my 1995 Volvo. Most newer cars get better mileage than I do. So thats about 75 cents a mile. the electric company charges me about 50 cents per kilowatt. so the roadster would cost me about $25 to fill up and only take me 160 miles, whereas my Volvo can take me nearly 500 miles on a $35 fill. Although Tesla is claiming up to 300 miles per charge now, with 45 minute fill ups. With the upgrades, of course, which pushes it well into viability if they can reduce cost and improve efficiency.
you are also forgetting the sheer cost of those new supercars of yours. the Telsa is slated to start at around $50,000. well out of the average persons range. With the 230 and 300 mile versions, you have to get expensive upgrades. pusing it well out of even the average upper middle class range.
And lastly, the first Teslas will not even be delivered until 2012, which, by that time, they will already be obsolete, or, they will have failed, because all they have now are test cars under controlled conditions. i live in the northeast, cold kills batteries. So they more than likely will not even be viable in cold weather, as the Volt is not.
The Chevy volt at only 40 mile range, does not even come close to meeting the average two-way commute for most people. The natioanl average is 26 minutes, or approximately 25 miles each way. So you would have to charge your car while at work. The average American drives 87 minutes per day, or close to 90 miles. You would have to charge your car TWICE during teh day to do all of your driving. Plus, mileage drops considerably when in cold weather. The Volt is a waste of time. Noone will buy it and it will be mothballed within two years.