Alpine has announced that it will be launching the aftermarket's first CarPlay unit for cars this fall. Alpine is calling the CarPlay device a console, not a car stereo. I'm not sure what that means, presumably it will have car stereo functionality like CD player and an FM tuner.
Specifications and features are unconfirmed at this time. The Alpine CarPlay console will reportedly sell for $500 to $700 without installation fees figured in. The device will be the first aftermarket way to add CarPlay support to your car. Some new cars from GM, Ford, and other automakers are expected to come from the factory with CarPlay support this year.
CarPlay allows you to plug your iPhone into the car and see content from its screen on the car's screen. In this case, the apps from your smartphone and the screen itself would be visible on the Alpine unit's screen. You would be able to launch apps and other content using touch on the screen of the console.