No, the whole point of iOS in the Car is that the iPhone is rendering the GUI. The car head unit is just displaying that UI, sending touch events back to the iP

No, the whole point of iOS in the Car is that the iPhone is rendering the GUI. The car head unit is just displaying that UI, sending touch events back to the iPhone, and sending audio to/from the iPhone. It was pretty clear from the WWDC presentation what ANCS is designed for: smartwatches and other "companion" BLE devices