Similar to Facebook Login on iOS, tvOS' Facebook Login would allow users to easily log in to their apps without having to worry about creating multiple accounts. Additionally, users wouldn't have to use Apple TV's cumbersome text entry method. Like some other TV authentication methods, Facebook Login would require a user to enter a confirmation code.
Facebook Login: A fast and easy way for people to log into your app and for you to provide rich, personalized experiences. To log into an app with their Facebook account, people can simply enter a confirmation code displayed on the TV into their smartphone or computer, rather than entering their username and password with the remote.While Facebook Login would make it simpler for users to log into third-party apps and games, it's unlikely the same ease will be available for video apps like HBO Go, which require a user to authenticate the app via a cable or satellite provider account.
The new SDK would also include the ability for developers to allow users to share links, photos and video from tvOS to Facebook and help developers understand their audience with Facebook-based analytics. Developers can download the SDK from Facebook's developer site.