Simplify your everyday life with the Google Home, a voice-activated speaker powered by the Google Assistant. Use voice commands to enjoy music, get answers from Google and manage everyday tasks. Google Home is compatible with Android and iOS operating systems, and can control compatible smart devices such as Chromecast or Nest."
Setting this up was a great experience. It was up and running in five minutes, linked to my content accounts, and streaming media like a champ. A couple of cute easter eggs that the kids had fun with too :)
Google Chromecast Audio: Stream your favorite music with Google Chromecast Audio. Simply plug into your speaker's auxiliary input and connect to your Wi-Fi network. Then just tap the Cast button from your favorite apps on your phone, tablet or computer to cast songs, radio stations and podcasts to your speaker.
I already had a Chromecast, but the Chromecast Audio was a great solution for the stereo in the basement. Linking the Chromecast Audio and the Google Home together into a speaker-group which enabled synchronized streaming to a set of speakers in different parts of the house. Cool solution, very easy to operate and manage.