In the new vehicles now the Apple CarPlay is the common place but for now the Apple is reportedly planning deeper integration for the iPhone projection system, that could better compete with Google Push to dominate the dashboard. Currently CarPlay connects via lightening cable or WIFI and presents the specially formatted interface for the key Apps like the Media and the navigation on the vehicles own touch screen. For several years the Apple has been exploring ways to tie the system further into the car.
In the year 2014 when the Apple CarPlay was launched the system was effectively remote projection. It plugged into the compatible vehicle the iPhone could display a pared back interface of the driver friendly over sized icons. The company only allows the selected the pre approved apps to be shown in the number of limiting distractions. Then the CarPlay has expanded, the latest iteration supports displaying content on the digital cluster of the vehicle if fitted as well gathering select telemetry from the car.
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Those features depends on the automaker supporting them and as with wireless Apple CarPlay that can take far longer to occur than the development cycle for the smart phones. In Google which has its own android auto projection system for Android phones, and has been attempting to convert auto makers to Android Automotive OS. The polestar 2 e.g Android Automotive OS can tell the users what the current state of the Electric vehicle battery is and use that the knowledge to better plan routes with the stopovers for charging sessions and the Google assistant to control, HVAC and other cabin setting by voice.
The Apple did have the Siri integration for the some automotive features, if the car companies opted to support them in their own apps but they were removed in iOS 15. The car companies themselves have been pushing ahead with more advanced voice control among other things. There are certain plans by Rivian to integrate the Amazon Alexa to do similar things in its electric trucks.