One interesting development is that I see the small "Nissan Leaf" style electrics competing against electric bikes now for the "second car / commuter car" role. For 1/10th the price ($4000) you can get a very top-of-the-line electric bike which is free to park, doesn't get stuck in traffic, has no regulatory costs, more flexibly to charge (removable battery), etc, etc. Of course it also has downsides (weather, exercise, safety), but I see those bikes more and more around Cambridge and they seem to make a lot of sense.
I mostly commute by cycling, and would like to consider an electric for longer commutes. There are a few problems, but the biggest one I'm concerned about is theft. It's so darn easy to steal a bike and get away with it.