As you can see above, Google is shipping out the QTS1 update to the Chromecast With Google TV, the update that brings along support for Stadia. If you’ve been waiting patiently for this support, the day has come.
In addition to support for Stadia, the changelog lists Bluetooth latency improvements, a fix for advanced video settings resetting, plus additional big fixes.
Be on the lookout for that update!
Read the original post: Chromecast With Google TV Gets Its Stadia Support Update