Comfort and Convenience
The on-board computer matters while travelling: it gathers trip data such as consumption and range from vehicle sensors and presents it on a display, so fuel stops can be judged from readings rather than guesswork.
Safety and Driver Assistance
The electronic stability program addresses cornering and evasive steering. Sensors compare the steering angle with the car's actual rotation, and when these diverge it brakes individual wheels to bring the path back into line.
Multimedia and Connectivity
Android Auto shows the difference clearly: the USB or wireless link is only the carrier, while the phone supplies navigation, messaging and audio, so the screen mirrors an interface the handset generates.