I have been waiting for an 800-lbs gorilla like this to move into the automotive connectivity market for a few years. Automotive electronics be it old GM Delco and any other electronic divisions have way too much closet system, proprietary and the infamous "not invented here" mindset when it comes to anything electronic in their car. That is for good reason, failure means more than your device not working, it could be a contributing factor to an accident.
Apple has some of the best UX designers in the world. They get that you don't just make a 3D rendered bitmap on a high resolution screen and keep the same user paradigm. You need to look at the whole experience and workflow. The teeth pulling needed to get Bluetooth built into cars over the past tens years shows a lot.
When this rolls out, I can easily see this as a make or break in automotive sales when people ask "Is there 'iOS in the Car' with this model?" If the sales guy can't say yes, they'll walk out and loose a sale. This is a big winner for Apple. Hell, I can see many holding off on a new car purchase 'til this comes out.
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I never foresaw the day where I would go to a car lot and say to the salesman..."I like this car, but.. do you have an Android version?"..
As if most Android users have the money and credit rating to buy a new car. While there are well to do Android users / developers, they are a small minority of the Android economy.
The lion's share of Android users get their phone for free when they sign a wireless service contract, refuse to pay for apps and complains dropping anything over $20 for a case.
They also become drama queens when they walk past a coffee shop and some Hipster's Linux laptop roots their phone via WiFi installing a bunch of nasty stuff -- those security steak outs are fun!!
Too bad there are no more Yugo's, an Android in the Car device would be a perfect match. Then there is Tata ...