here's food-for-thought.....
"drive by wire" has been around for a few years. That means you step on the gas pedal, connected to a sensor, which sends a signal to the computer. The throttle is then opened or closed by a stepper motor via the computer.
Ergo, the driver has no direct control (cable/linkage) over the throttle. Corvette is the first example that comes to mind.
The next geenration of the technology was "anti-crash" features. Mercedes uses a proximity sensor to determine if you're about to run into something. If it thinks a collision is inevitable, the computer links into the anti-lock brake ssytem, over-rides the brake pedal, and stops the car for you.
Now Lexus has one-upped the game with its "self park" feature. Guess what! Now the computer tells the car how to steer!!! I haven't heard whether or not the driver is completly over-ridden, or if there is still a mechanical connection between the steering wheel and the tires.
Further, it has been proposed, and even implemented in test programs, that via satellite telemetry an emissions failure can be reported to a monitoring center; and if the vehicle is not repaired within a prescribed amount of time, the car is disabled. I'm not current, but the program was being considered for OBD-IV.
And for lovers of photographic speed-measurement devices.... You guessed it! There has already been at least one nationally publicized lawsuit involving one rental car company who installed speed sensing devices which communicated when drivers broke the speed limit in rented cars - and issued citations when the cars were returned! Can you imagine automatically getting a ticket every time you broke the speed limit, via a satellite-tellemtry system linked to the highway patrol computer? The technology is absolutely present, and I'm sure some in our beaurocracy would love to protect us from the deadly practice of exceeding the posted speed limits..... (And make a buck in the process)