Designed for the fourth and fifth-generation Apple TV models, the new tvOS 11.4.1 developer beta can be downloaded onto the Apple TV via a profile that's installed using Xcode.
No new features or changes were discovered in the first tvOS 11.4.1 beta, suggesting it focus on fixes for bugs that have been discovered since the release of tvOS 11.4.
Apple's tvOS updates have historically been minor in scale, and Apple does not often provide us with detailed notes outlining what's new. We'll update this post should anything be found in the second beta.
Apple's work on tvOS 11 is winding down as the company is now focusing on tvOS 12, which was unveiled at the Worldwide Developers Conference last week.