I dread the day that FBW gets into the automotive ....
It has been for over a decade.
Drive-by-wire throttle has been in some Toyotas (and no doubt many other cars) since at least 1998 that I know of. I have one of those engines transplanted into one of my cars.
The braking system is also being dabbled with, Mercedes for example have or at least had a system that varied the pressure to the calipers based on how quickly the pedal was pushed; In a panic stop it'd sense you stomping on the pedal and so direct a lot more pressure than normal into the system.
Electric steering is also being looked at and has been tested on company tracks. By electric, I mean there is no mechanical steering rack, etc.
It's here already.