https://techcrunch.com/2017/10/04/google-has-sold-55m-chromecasts-and-provided-100m-answers-via-assistant/

Google announced on stage a few numbers to update its progress on its hardware program – the company said that it’s sold over 55 million Chromecast devices, including Chromecasts and hardware with Chromecast built-in and that it has built up a database of over 100 million answers for users via Google Assistant, its voice-powered AI software.

The other success metric that Google noted was that its Google WiFi mesh networking router is the top-selling in that category in both the U.S. and Canada. It’s still a relatively young category, but there are lots of entrants now, so that’s impressive.