Today, Apple officially renamed its iOS for car initiative to CarPlay, the name remnants another technology from Apple called AirPlay, which allows media streaming from Apple mobile devices to home entertainment center. CarPlay has almost similar concept, except the car dashboard replaces the home entertainment center. At least for the time being, the iOS device needs to connect via the lightning wire to the car, but rest assured a wireless connectivity is coming, but for practical purposes, the wire provides juice to the power thirsty iDevices is still much preferable for the long commutes. Another huge difference is the 2-way communication with CarPlay. commands destined to iOS device can be issued from the touchscreen car dashboard infocenter or via car hardware switches, knobs.. depending on the car manufacturers.
The main idea behind CarPlay is to bring information/ communication from the iOS device to a distract-free driving by proving route navigation guidance, music playing, phone call, messaging, etc.. to the main touchscreen on the car console.
Car manufacturers promise to adopt CarPlay including Ferrari, Mercedes-Benz, Volvo, BMW Group, Ford, General Motors, Honda, Hyundai Motor Company, Jaguar Land Rover, Kia Motors, Mitsubishi Motors, Nissan Motor Company, PSA Peugeot Citroën, Subaru, Suzuki and Toyota Motor Corp.
Note that CarPlay only plays with iOS devices
Volvo just provided a glimpse of how CarPlay works on its car in the below video. You can read more at http://www.volvocars.com/carplay