If they can equal the cost, performance and convenience of gas or diesel I say go for it.
They've already got the performance part covered. The model S does 0-60 in something like 2.5 seconds, which is insane. I've never had a chance to drive one but I hear that it's actually unsettling how fast they are, especially given the lack of engine noise.
Costs are high right now obviously, but those should come down quite a bit as the technology matures and the market increases.
Gas should be $9 a gallon, when you factor in all it costs us. The entire Pentagon bill to stabilize the ME, global warming and real estate loss from rising sea levels, etc. We should be grateful it isn't more.
Electric cars are the true money savers for Americans.