So it’s not just me. I have a Sonos sound bar and am trying to test some Dolby atmos content on it. I even upgraded my Netflix subscription. There is plenty of 4K content but have yet to see any Dolby atmos as you said.They have sweet FA Dolby Atmos content. it'll only be in the 4K movies and apparently, the Dolby Atmos logo will be in the description. But I'm yet to see it.