I would not associate the interface with the functionality. Even without a keyboard, a smartphone with a touchscreen allows one to use a virtual keyboard to typ

I would not associate the interface with the functionality. Even without a keyboard, a smartphone with a touchscreen allows one to use a virtual keyboard to type in a similar fashion to an actual keyboard with some definite compromises. With cars when the manual controls are removed, we have a chance to have even more robust functionality with opportunities to map a whole new set of controls to a fallback interface.