Not UI, but you mentioned one part where software could really shine: instead of getting the feel of the "inverted pendulum" driving in reverse with a trailer, what if I could just turn the wheel where I want to go and let the computer figure out how to keep the back in line without jackknifing on itself.

(I am also sure such software exists, and it fares poorly, otherwise it would be a standard accessory on trucks and everyone would have forgotten how to do it "by ear" by now.)