They're not really "open-sourcing" anything in the sense that I would think about it. As far as I can tell they're doing two things:

* Removing cloud-server dependency from the app.

* Publishing API documentation for the speaker.

I actually think this is worth noting not so much in a "well aktshully it's not open source!" kind of way, but as a good lesson for other manufacturers - because this is meaningfully good without needing to do any of the things manufacturers hate:

* They didn't have to publish any Super Secret First or Third Party Proprietary IP.

* They didn't have to release any signing keys or firmware tools.

* They get to remove essentially all maintenance costs and relegate everything to a "community."

But yet people are happy! Manufacturers should take note that they don't have to do much to make customers much happier with their products at end of life.