Those boxes are in a skin for normal Android to make it work with the TV. The only device you likely come in contact with with Android TV is the new Chromecast or a Sony TV. Other than the Nvidia shield and the Chromecast most actual Android TV devices still come with malware from the manufacturer. Even the Sony TVs, but basically every Smart TV comes with malware to spy on what you're doing too.

I think the new dish network's at top box also runs Android TV, maybe you found one of those wild.