I got fed up with the never-ending audio dropouts on my Roku and bought the ATV 4K when it was announced that it would stream Atmos on Netflix. I've decided that I need to own three streaming devices to get current state of the art from providers:
ATV 4K: Netflix Atmos/HDR, stereo only on Hulu, difficult search for 4K on Prime, easy access to iTunes 4K material
Fire stick 4K: Prime 4K Atmos (the 4K versions come up in the menu front and center, with no searching required, Dolby Vision, and 5.1 sound on Hulu.
Roku: The many channels that are not available on the other two.
JVC RS600 Chad-callibrated, 120" 1.3g in Batcave HT, Denon X8500 Polk LSiM703 fronts,
RTi-12 rears, LSiM 706 center, Monitor 40 Heights, Monitor 60 FW, FXiA4 Bi-pole sides,
LSiC top front, Infinity 6" VOG. 4X 12" subs w/mini DSP on sub 1 and nearfield 18" from sub 2.