https://techcrunch.com/2018/01/08/google-brings-its-assistant-to-android-auto/

It’s no secret that for Google, this year’s CES is all about the Google Assistant. One Google product where the Assistant hasn’t really made any inroads yet, though, is Android Auto. Starting this week, though, Android Auto users in the U.S. will also get full support for the Assistant in their cars.

Now you may think that the Assistant was already available in Android Auto, given that the service always responded to voice requests. But for the most part, that was still the old Google Now-style assistant, not the newer Google Assistant (yeah, I know, this is confusing). Maybe the biggest difference here is that you will be able to access all of your third-party Google Assistant services and control your smart home devices from your car now, too.