raz-0, thanks for that. I think. I'm not sure I need to control anything in the car with the phone. I only used the cars' audio system to make a phone call two or three times since I got the car. I can't imagine trying to play with apps when I'm driving.
It's not controlling the car with your phone, it's controlling more of your phone with your car.
So for example, instead of the makers of yelp and harmon trying to get their act together and failing with the 6.5" head unit, yelp just has to sort stuff out with apple, which they have some practice at, and apple sets up a bunch of standards to interfacing with car play, which they have some decent experience at, then apple (and google) behind closed doors can look at harmon, say "really? REALLY?" then tell them to get away form the keyboard and let them just code it for you so it works.
So then yelp might not just work on day one when you get a car with car play, it might even get.... updates.
All of the above you may not care about. Myself, I can't fathom why I would want yelp on my dashboard. For navigation, my phone is pretty serviceable. given that a larger phone is basically the same size screen as my head unit, it's not something I would care much about. Some people will be like... SPOTIFY?!?!?!? SQUEEEEEEEE!!!! and I would stare at them and shake my head, but whatever floats your boat.
If you already own your renegade, it's a moot point, given that they are doing a full revision number on the head unit OS to support it, it will very likely not ever be something offered to us via software.