Controlling a mobile phone while driving while using your voice is definitely a thing. And I suspect if you have your phone hooked up to your car stereo, or in

Controlling a mobile phone while driving while using your voice is definitely a thing. And I suspect if you have your phone hooked up to your car stereo, or integrated using Google or Apple's in-car docks, then using your voice to play music is also possible. I think your point about not having a good model is correct, though, for anything other than basic uses (phoning, messaging, playing music, navigation, weather, etc)