Joystick driving! Very cool...
SAAB, I had thought, was working on this as well.
In my younger days, I was toying with making something like this for my Fiat, and then for my Chrysler Lazer. I was also thinking of a smaller secondary mini-steering wheel that would go in the center console in a relaxed area where your arm was at rest on a armrest pad and the mini-grip control was at the front, so on long trips, it was a good location and arrangement for controlling the vehicle.
Figuring up failsafes for mishaps is the difficult part. Mine was to have a backup battery and a servo that was tied into the input zone for the rack and pinion steering, (gear assembly going to a motor, driving the steering input shaft, but with a steering wheel hub still located on the dash in case of emergency. Small thing that wasnt in the way).
This is a sort of aircraft yoke I made for my car years ago. Not the greatest in turns. Takes some getting used to, but after using it for a while, it was not difficult at all. Made 9 of those things, lol.. My brother put one on his car. A friend wanted one.. had some left over prototypes. Sold the one in my car with the car.
So many things that could be done with vehicle controls....
Bill