Agreed, tvOS 10 has some interesting features like much-improved search, single-sign-on authentication, Apple TV remote app for iOS devices, better Siri capabilities etc. However, Dark Mode has beaten them all in terms of attracting more attention.
Being very fond of movies and reality shows, I enjoy watching them at night. The only thing that comes in the way of my enjoyment is the high-resolution screen of TV. There have been quite a few times when I had to stop watching movies due to the straining or burning of my eyes. Fortunately, it's no longer the case now.
How to Enable Dark Mode in tvOS 10 on Apple TV
Step #1. First off, you have to click Settings on your Apple TV.
Step #2. Next, you need to select “Appearance.”
Step #3. Finally, select Dark.
Now, enjoy watching your favorite movies in the Dark Mode.
How to Disable Dark Mode in tvOS 10 on Apple TV
It doesn't take much effort to disable Dark Mode in tvOS 10.
Step #1. Click Settings → Appearance.
Step #2. Now, simply deselect Dark.
Dark Mode has been available on Mac for quite some time. I am pretty happy that Apple has brought it on Apple TV as well. Frankly speaking, this feature is more profound on TV than on Mac due to some limitations.
Just like a lot of iPhone users, I had been eagerly waiting for Dark Mode to arrive in iOS 10. However, that was not to be. As per reports, this much-awaited feature is currently being tested and could well arrive on iPhone in near future.