The amount of energy to move you from point A to point B is not fixed.
It varies based on how fast you want to go, drag, effiency and the amount of excess weight you drag along with you do do the job.
The automobile is very effective but it is a hundred year old idea. There are other ways to get the same job done and some days people will be amazed that we got into a 6000 pound mechanical contraption with hundreds of moving parts to get around.
Keep this in mind, we burn about 200,000,000,000 gallons of fuel, kill about 50,000 people a year and spend hundreds of billions of dolars a year creating reinforced roadways to handle these heavy beasts.
I love my car and don't plan on giving it up for something less usefull, but on the other hand, I don't want to be a "buggy whip" salesman either.
There is a lower bound. Yes, there are lots of other external considerations that will increase the wasted energy, but you can't go below some minimum limit required to move the mass from point A to point B.
Of course, there will be the backlash against these vehicles the minute we have the first accident when battery acid is released into the street, eating away at an otherwise lightly-injured victim, killing her (IF she's lucky) and horribly disfiguring her corpse at the same time.
These vehicles are, at the present time, only a goreon's wet dream. They will NOT be useful for a VERY long time ti come.