While this may sound like exciting news, this Jailbreak will only support SSH access, without any sort of UI implementation. In the future we may see a version of Cydia(or some alternative) pop up on Apple TV 4, for now this Jailbreak is mostly for developers to begin building tweaks, themes and more.
Tweaks on Apple TV 4 would be a great way for folks to use the device with new features Apple doesn't offer. It may sound like a small step, but thinking long term, Apple TV Jailbreaking can have endless possibilities.