You could put a Dot in your car. It's USB powered and you can plug it into your stereo with an AUX cable or some such. You would just need to tether your phone's wifi or have some other in-car wifi solution.
Lots of issues with hacking something together like that, though -- I really want something which ties into vehicle sensors, the can handle calls/mute/etc., mixing nav + voice + music dynamically, etc.
At that point it's basically worth building a car computer. Possibly using Alexa for the voice, but if I'm doing a car computer, I think a hack to work with Cortana or Google or Siri might be easier.
It's amazing no one has done a good job of this yet -- it's been within feasible for 10y, and commercially viable for 5y for big companies, or 2-3y for startups just using existing hw. I think it's because not enough good product/dev/etc. people have 1h+ car commutes.
At that point it's basically worth building a car computer. Possibly using Alexa for the voice, but if I'm doing a car computer, I think a hack to work with Cortana or Google or Siri might be easier.
It's amazing no one has done a good job of this yet -- it's been within feasible for 10y, and commercially viable for 5y for big companies, or 2-3y for startups just using existing hw. I think it's because not enough good product/dev/etc. people have 1h+ car commutes.