Apart from "detecting whether you are drunk" I can think off a new bill (once majority of the cars will have that thing installed) that will give certain author

Apart from "detecting whether you are drunk" I can think off a new bill (once majority of the cars will have that thing installed) that will give certain authorities the 'button' to use that kill-switch. So, your car is stolen, and a helicopter is following your car in a high-speed-chase that we see on TV/YT? No more! Now the relevant agencies will be able to kill you engine and you will slow down - to a halt.