From watching the Volvo, Audi and Ferrari implementations, one thing that struck me was the poor implementation of a powerful software: - Generally dismal hardware, specially the Ferrari (resistive touchscreen?). Software is also less than amazing: slow responsiveness, laggy scrolling. - The "home button" is not in any easily reached place. It's just above the bottom left corner, and is in no place you could easily feel/touch/reach while keeping your eyes on the road (a physical hot corner, if I may). Why don't Apple keep the actual home button and demand this on cars? One major thing that struck me is that this is Apple licensing their main operating system; one of the first things Steve did after taking over from Amelio was stopping the licensing system for the Mac OS at the time (or making the price prohibitively high). Apple has given up complete control over the Hardware+Software experience on all devices iOS 7 runs on.