Was just checking out the guts of a stripped down Tesla car. There is nothing to them, would probably need to add some weight to the chassis to maintain traction. Couldn't see if they are brushless but in principle looks like just a variable torque slip ring motor that transfers torque to the wheels through a gearbox, or down a drive train if you want rear wheel drive. Will put the mechanics and emirates out of business but make those in a niche trade like mine rich.
At the moment though would still have a bigger footprint than a small car in Australia since to charge them would require burning more coal than it does to burn petrol.