Yeah, I was reluctant to say Bluetooth because it implied that we should stick with existing protocols but that isn't exactly what I meant to say. Rather we should have some forward thinking protocol that works over multiple interfaces and is still open and platform independent like Bluetooth. Maybe even just a baseline Car Dock standard requiring Microphone, Speakers, and a Touch Display.

Bluetooth is just so encumbered with legacy concepts and limitations. It hosts a myriad of protocols that don't benefit users but are easy to implement to check the Bluetooth feature checkbox. There's a full generation of Bluetooth equipped cars that only support headset or handsfree protocols but not A2DP or other useful protocols people want.