This past Christmas saw a large growth cycle in home devices such as Amazon Echo and Google Home. These devices will become an expanding paradigm of search. Since both rely on voice recognition and search, the world of SEO may be entering a new phase.
This article in the telegraph a few months ago had some discussions on SEO and Amazon Echo and Google Home comparisons.
We think these devices will grow and become a go-to tool that more people use to hear their searches results.
A Few more interesting links on SEO and Amazon Alexa, Google Home, etc
This has some interesting stats for voice SEO for devices