Google Play Services 8.1 has finally finished rolling out to users. In addition to bug fixes and changes on mobile devices, there are also a handful of changes for Android TV devices as well.
Nearby, the proximity API, now includes listeners so apps know when devices connect and disconnect. This will make it easy for solitary devices like TVs to automatically know more about devices in its vicinity.
Another new feature for game developers is Player Stats. This API will give developers information about the current player such as days since last played and average session length. Theoretically this will help encourage casual players to interact with games more, but it’s yet to be seen how games actually implement this new data. Read more about it on this Google Developers page.