I can tackle the whole Ultra HD Blu-ray thing, complete with Dolby Vision all the way through the chain, and I have a 5.1.4 rig for Atmos / DTS-X at the moment.
LG OLED65B7P display
Panasonic DP-UB820 Ultra HD Blu-ray player
Marantz SR6012 receiver
Axiom Millenia M60ti floorstanding mains
Axiom VP100 center
Axiom QS8 surrounds
Axiom EP350 subwoofer
Axiom M3 in-ceiling height speakers (x4)

1775

Quiet Days in Clichy (4K Ultra HD) (Blu-ray) Ace High (Blu-ray) Batman and Superman: Battle of the Super Sons (4K Ultra HD) (Blu-ray) Scream 2 (4K Ultra HD) (Blu-ray) The Return of the Living Dead (4K Ultra HD) (Blu-ray) Batman - The Long Halloween: Deluxe Edition (4K Ultra HD) (Blu-ray) Kamen Rider: The Movie 1972-1988 (4K Ultra HD) (Blu-ray) Belle (Collector's Edition; 4K Ultra HD) (Blu-ray) Green Lantern: Beware My Power (4K Ultra HD) (Blu-ray) Uncle Sam (4K Ultra HD) (Blu-ray) God Told Me To (4K Ultra HD) (Blu-ray) Hell High (Blu-ray) The Horse Soldiers (Blu-ray) Teen Titans Go! & DC Super Hero Girls: Mayhem in the Multiverse (Blu-ray) The Man Who Shot Liberty Valance (4K Ultra HD) (Blu-ray)