I don't know its good or not cause this cars are more smart, but cars on gasoline are more faster, so what do you think about this? 
They are not that much slower,you can see tesla for their amazing production of e cars which is going to rule the world in next fe decades because we only have enough gasoline only for next 50 years.Most of the other competitors like BMW are also bringing hybrid cars which can run on both electricity and also in gas.