http://image.motorcyclistonline.com/...dyno_chart.jpg
If they actually gave the Tesla Roadster a good transmission it could be pretty decent at higher speeds. Also, I'd like to see a double-motor Tesla. Electric motors are so much more precise than gasoline engines it's far more reasonable to run them in tandem with each other. Imagine if you had an electric car with multiple electric motors, all of which could be operated independently and even shut off if you didn't need the performance. If the battery tech is there to back it up, the possibilities are endless.
However, with the advent of algae oil I'd say none of these next-gen fuel sources will completely replace the internal combustion engine. They'll just fill a different niche in the market.
P.S. Can we get some ****ing electrorheological transmissions up in here? For ****'s sake.