They did announce in 2018. No follow-up since. I've asked and no one knows. Don't know why they would say they are "excited to announce" and not follow-through.
If you put out a post a couple of years ago regarding whole home entertainment and then you don't follow-up with your customers - it's just a tease. Also your reps didn't know about your own post.
Here is the post: https://www.roku.com/blog/whole-home-entertainment-roku-entertainment-assistant
Here is the news: https://newsroom.roku.com/news/2018/01/roku-unveils-whole-home-entertainment-licensing-program-enabl...
I have built my whole home around this announcement.
I have 4 Roku TVs, 2 sound bars, and ready to upgrade with more speakers - but I need to have an assurance of your roll-outs and intent.
My home is Smart - but I want Roku to be the main hub of my home audio. Will it happen?