The Apple implementation of things like Netflix, Amazon video, BBC iPlayer, Hulu,You Tube are all pretty good.
iTunes Movies are some of the best quality going for a streaming service too if you want to redeem iTunes vouchers or rent movies or even buy the odd digital title.
The apple TV4 has just had an update like the 4k model called match frame so it will automatically switch to the refresh rate of the material its playing including 24p (23.98p) One of the very few streaming boxes to do this
You can use it as a head end for LAN based media by installing infuse or MrMC straight from the App store which is a Kodi fork, side loading Kodi via the USB c port. But it won’t support ATMOS or DTSX at all and needs to pass through HD audio formats as PCM.
Its not the best ‘kodi’ style solution out their but as a streaming box it does a lot really well - you should try it out.