Disney+ has a selection of UHD & HDR movies to stream e.g. Big Hero 6.
My Roku player and X2600H are 4k/Atmos capable but my Epson 2150 is only 1080p/3D.
When I select to play Big Hero 6 the info on screen depicts "HD / Dolby Atmos" and when I start the movie my AVR displays Atmos as the source and when checking the stream info it also confirms Atmos as the source (and since I turned on Height Virtualization it also displays height speakers in use on the left side of the status image, and actual speakers in use on the right side).
It looks and sounds great and makes it hard to justify upgrading the projector.