Earlier quoted context omitted.
Some cars are going with entirely electrically actuated brakes, either inboard on on-hub, compared to the E-Tron which uses traditional hydraulically actuated brakes. One uses an electric motor to wind something to tighten the spring clip by pulling it that then pushes the pads to the rotor and the other uses pressure to overcome the spring by pushing the spring to compress it and push the pads to the rotor. I'm gues…
Are talking about brake-by-wire? Where brakes are controlled by electric only, and if electrics die, no brakes? These are dangerous. Cars are not maintained to aircraft standards and will never be.
edit: as formerlyproven below states, the ones currently for sale also have a hydraulic backup.