Yes. I've ordered the Apple TV 4k but only really to get Netflix with Dolby Atmos/Dolby vision.
I have a shield tv(the best streaming box) but Netflix dont support Atmos/Vision on the box.
I've also got the now TV 4k box. A royal pain in the ass to get the enhanced features.
I've spoken to now TV with regards to 720p and also got a "it's on our roadmap" along with subtitles which is nothing short of a disgrace. Can count on one hand the number of entertainment programmes which offer subtitles.
Now TV really need to up their game!!
Why get an Apple TV if you’ve got a Dolby vision enabled tv then why not use that and you should get Atmos through arc albeit not the lossless.