Indeed, Google made also a post here in the Community Blog: https://community.stadia.com/t5/Stadia-Community-Blog/This-Week-on-Stadia-Play-games-on-tens-of-mill...
Very cool! Even that they rolled this feature out earlier today, which is amazing.
As far as I know they are also working on getting it on more and more phones and tablets, which is great, but one step after another. 
