Rich Results Testing Tool Adds Support to Preview Your HowTo Results on Smart Displays
https://twitter.comGoogle announced on twitter that the rich results testing tool now also supports showing you how your How-to markup will look on the Google Home Hub and other smart displays while bringing up the result using Google assistant.
You can try loading up this review link generator from Supple where I have implemented HowTo Schema. Here is a direct link to the preview.
Please note that this is not live on smart displays BUT it looks like we might soon start to see these content on smart displays.