I don't think we'll see full electric-only cars as very popular here in the USA for a LONG time. Like...nevermind, too far ahead to imagine. We all like power, whether we NEED it or not.
And people have wised up to the electric cars that you plug in- there is still fuel burned to make the electricity, so are you really gaining? With hybrids, I believe you are, because it is all working off of the gas tank, and regenerative braking. Why waste that?
When they can put the hybrid motors in full-size vehicles, not specialized vehicles, then it'll be viable. Put them in police cruisers, or taxis, show me they can last. In 10 years, I might buy one used. I hear they're a great deal though, considering how much they actually cost to produce.