Hello, is the Stadia app in the Play Store also compatible with Android TV?
Is it compatible with ARMV7 architecture? (Most Android TV are ARMV7 architecture)
Google has a history of being all-in on something new and then lose interest. There's a big graveyard dedicated to abandoned Google projects. I'm not sure of the status of AndroidTV and if Google still has an interest in it. They abandoned AndroidTV support for their Nest products.
Support for Android TV is definitely coming. Just no word on when. What's more, the next generation of Chromecast Ultra will have the AndroidTV OS built in and will no doubt have native Stadia support.