Atmos options
PC - hdmi out-atmos on true lossless audio(win 10 with dolby home theater app installed) - works for downloads and netflix app - no atmos on prime video app
Android box(mi box etc) - max support dd+ - can do netflix dd+ atmos thru kodi all others no
Apple tv 4k - netflix atmos no prime video. May get for downloads using infuse app.
Bluray disc player - true lossless atmos on bluray discs. Some may have inbuilt apps for netflix/prime but atmos doubtful
All in one solution - nvidia shield tv but very costly