You may have seen there is a new update for the Apple TV. So, you should now be running TV OS 11.
With this update, you can now access catch-up TV services such as BBC iPlayer, and are able to share your Mac, iPad or iPhone screen to your TV via AirPlay.
It is also possible to download a variety of apps from the App Store, and, with the very latest model, it is 4K compatible, giving you high quality viewing!