https://wccftech.com/download-tvos-11-1-final-for-apple-tv-4-apple-tv-4k-heres-how/

Apple TV 4 and Apple TV 4K users can now download tvOS 11.1 software update. Here’s how you can right away.

It’s a well-known fact that tvOS 11 was not a huge update in any way. It exists mainly to compliment the Apple TV 4K, nothing else. But aside from that, Apple squeezed in some little changes that makes its set-top box relevant in the entertainment space. This in turn means that you should keep on updating your Apple TV as updates arrive in order to keep things as smooth as possible.