I'm not interested in the iPhone 7 either, but it's not because of the headphone jack. It just doesn't offer me any compelling features over what's already in the 6s -- at least not enough to justify the money again a year later. If the 7 had the same area the Plus had, I'd buy it in an instant.
That said, Apple totally lost some customers over the headphone jack. No question. Then again, they almost certainly gained some customers who frankly just don't care about it, especially thanks to the exploding Samsung miracle.
But, I don't think you can use older Ford and Honda vehicles as any kind of benchmark as to what we can expect in the near future. And, as much as I'm suggesting contactless wireless tech is likely coming to a portliness iPhone, that won't be the only way to charge it. For me, this is all about what's happening with the Lighting connector. Many keep suggesting that Apple should have switched to USB-C, despite the 500+ million installed Lightning customers, at a time when USB-C is virtually nonexistent in the wild. By the time Apple is ready to remove Lightning to go wireless, and USB-C has achieved some kind of market saturation, Apple will switch to a back-up magnetic inductive charging via the SmartPort. So everyone will exchange their Lightning cables for charging pucks, when wireless charging doesn't meet their needs. But most people will never need to plug their phones in.
So, in the event you're still driving an older car with a horrible BT radio, you'll just snap the SmartPort to 3.5mm connector onto the phone and have that wired connection you need. But it will theoretically save us the transition to USB-C, and be far more useful for a mobile device.