Thread border router is nice I guess.
Integration with HomePods is ... well, if you have HomePods.
So... No real functionality to justify the price.
I guess if you're not really quite deep in the Apple ecosystem, there's probably better options.
That doesn't stop me from being realistic about AppleTV: it's a waste of a product. It's a veritable supercomputer in your living room whose only purpose is streaming. Literally everything else is a crippled afterthought.
That's why I was baffled by the original comment: "$300 might be a decent price if you use it for all of the things that it can do". It doesn't do a lot, does it?