It had been talked about as part of the next major iOS update, but with the Geneva Car Show currently taking place, Apple CarPlay has finally broken cover. Just don't go expecting to run it in your 10-year-old runaround next week.Apple's new in-car interface will initially be showcased in new Ferrari, Mercedes and Volvo cars unveiled at the motor show, with BMW, Ford, General Motors, Honda, Hyundai, Toyota and others signed up to use it in future. So if you are buying a new car this year or next, you might see it as an option. This all-new interface has been designed to work as the middle man between car and phone, with both touch and Siri-based navigation, depending on whether you are able to use your hands or not. The icons are pretty much what you would expect, looking like your current iPhone screen. Within that navigation, you can access contacts, voicemail, notifications, maps and your music. Interestingly, it will also cover third-party apps too, including Spotify at launch. Good news if you have a subscription for that.Whether you want it will largely depend on whether you have an iPhone, as well as which iPhone you carry. The service will be available as an iOS update for Lightning-enabled iPhones. So if you have an earlier model than an iPhone 5, sorry, you're not invited to this particular party.There are a few unanswered questions, but most of those should be covered once someone gets a test drive with CarPlay. Wondering about the data implications too. But overall, it's an interesting move by Apple and a long overdue uniform solution to the problem of phone meets car.Google, it's over to you now.