The first is Dolby Atmos, the latest surround sound technology. Here’s Wikipedia’s explainer:

TL;DR is it sounds immersive, but tvOS needs to support it to fully take advantage of modern speakers like LG’s SJ9 high resolution audio sound bar. Apple has said it will support Dolby Atmos in the future, but for now I need to use the built-in apps on my TV to take advantage of the best sound technology.

Then there’s YouTube and 4K HDR. Apple and Google are currently at odds over how 4K videos should be streamed in a boring format war that no viewer should ever have to worry about.

It’s the same reason why Safari can’t stream 4K videos from YouTube on the Mac but Chrome can, and it’s not clear when the two companies will work out their differences and enable 4K video playback. Apple TV 4K launching without 4K support for YouTube means the built-in YouTube app on my TV offers a better viewing experience than the Apple TV despite otherwise offering an inferior experience.

Introduce Dolby Atmos support and work out the formatting issue with YouTube and for me I’ll never need to switch inputs again.