Some Android TV users on Reddit have noticed that their big-screen devices are now appearing as connected devices when it comes to installing Google Play Store apps on their smartphones. This means the mobile devices can now be used to "tell" the TVs in question which apps to load as well as what content to display.
https://www.notebookcheck.net/An-Android-user-can-now-use-their-smartphone-to-get-applications-onto-some-of-their-TVs.579804.0.html