If every car was electric, and we needed X more powerplants that burn say, coal, to power them. We would still be letting out 50% less CO2 emissions than we do right now. So it's cleaner than what we have currently. And as powerplants become more efficient at making electricity, those numbers will go down even more.
The point I'm trying to make is that someday (soon), there just isn't going to be any gasoline. It's never a bad time to think about what type of alternative fuel your interested in. Electric cars are just one of the many options, but since most of you here are interested in performance, not just gas mileage, electric is probably what your going to want to keep your eyes on. Also like I said before, the Roadster is going to drop down to about $50k which is only a fraction more than the Elise's that are running the Toyota motors in them.
Theres also another company (who's name I can't remember at the moment) who is going to produce an electric 7 seater crossover sport utility (also with help from lotus). It's expected to get 350 miles per charge. Also it is AWD and runs a high 4sec 0-60. The best part about this car though, is they claim it will only take 10min to get a full charge. That's about how long it takes to fill up on gas and get a drink right now. Not bad at all. The other thing is, batteries are getting about 8% more powerful every year. So if this trend keeps up (and it is expected to) a car that gets 400 miles per charge now, in 6 years will get 600 miles per charge. In 12 years it will get 900, in 18 it will be close to 1400. Also the batteries are recyclable.