When were thinking of buying a car, finding out the specific model we were looking at had Apple CarPlay was what tipped the scales in the end. We were getting a base model Hyundai Santa Fe without GPS or any of the other bells and whistles. In the end navigation was the only feature we wanted in the next tier up so this made the base model sufficient for our needs.
So far my vision for how I would use CarPlay has been everything I hoped it would be. Turn by turn navigation (now with Google maps but Apple maps was fine too) is really great on the screen. Though I am used to GPS giving very dumb instructions I use them as a reference rather than a source of truth and it's never been an issue. Having text messages read aloud and then dictating a response hands free has been great.
Our version of CarPlay requires a cable which is honestly the only drawback. Newer car models can do it without having to plug in any wires which is even better.
Overall I am sold on the idea of having your phone serve as a replacement for cars' rarely if ever updated media and GPS offerings. Voting two hands in favor of this technology.