When you say people, are you referring to people who are in a position where they could buy an electric car, but have not yet?
I personally feel the vast majority of people have not switched because:
1) Cost
2) Options (we're a country that loves SUVs/Trucks)
3) Housing / Charging
Funny enough, I could probably afford an electric vehicle, but I have no way of charging that vehicle due to my housing situation.