That's all great, but the real thing that will stop it is economics. We have a PHEV and I calculated it out and we pay $8 per gallon equivalent compared to $5.50 for regular gas. That's a pretty big difference. Right now we ignore the EV part of the vehicle. (Live in California and I pay $0.50/kwh.)
We're planning on getting solar shortly and that may make it feasible, but until then, it's not.