"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Buick and GMC Announce CarPlay Coming to Select 2016 Vehicles
The built-in IntelliLink screen will indicate when a CarPlay or Android Auto compatible smartphone is connected via USB, enabling quick and easy access to Maps, Phone, Messages, Music, Podcasts and third-party apps such as Spotify, Rdio, iHeartRadio, CBS Radio and MLB At Bat. CarPlay also uses Siri voice control and interfaces with your vehicle's knobs, dials and buttons for hands-free or eyes-free control of your iPhone.
GM announced in late May that it is adding CarPlay and Android Auto support to 14 new 2016 Chevrolet models later this year, with the 650 HP Corvette Z06 the first vehicle to roll off the assembly line and head to dealerships. GM's luxury car brand Cadillac will also be adding CarPlay and Android Auto support to its 2016 model vehicles equipped with a CUE 8-inch multi-touch screen, excluding the SRX Crossover.