http://www.techradar.com/news/evidence-mounts-for-google-home-mini-as-it-makes-appearance-in-the-home-app

Evidence is mounting that we're about to see the announcement of the Google Home Mini, a smaller version of the Google Home smart speaker similar to Amazon's Echo Dot. 

This leak comes courtesy of someone who lives near Google's campus in Silicon Valley, who discovered that the device was available for setup in their Google Home app.