Designed for the fourth and fifth-generation Apple TV models, the new tvOS 12.2 developer beta can be downloaded onto the Apple TV via a profile that's installed using Xcode.
tvOS updates have historically been minor in scale, focusing on under-the-hood bug fixes and improvements rather than major outward-facing changes. Apple provides little to no information on what's included in tvOS updates, so we may not discover anything new after installing the new beta.
While we don't know what's new in tvOS updates most of the time, we share when new software is available so developers are able to download it upon release.
Should we discover notable changes in the tvOS 12.2 beta, we'll update this post with details.