> Even though cars increasingly look like laptops on wheels, the actual computer bit is relatively minor and the user interface is mostly the wheel and pedals, not so much the screen.

Ha, it seems like that to you because you are obviously a car person! For someone like me ideal Apple car would be something without any kind of wheels or pedals. Instead, I should be able to crawl drunk into it, mumble "Siri, take me home" and pass out snoring loudly on the back seat. I guess several years ago when it seemed that (true) self-driving cars are just around the corner Apple had something similar in mind.