I am still waiting for a classical record reviewer tell us how really
great a disc sounds with Dolby Atmos. So far I have just read how
great movies with helicopter noises bouncing off your ceiling sound.
Opera blu-rays with 15 year old 5.1 lossless surround are really good,
I admit, I have only three Dolby Atmos titles: Karajan's 70's set of Beethoven Symphonies (best incarnation ever!), the recent complete Karajan Sibelius DG recordings (again, best incarnation ever!), and the Salonen/LAPO Moussorgsky/Bartok/Stravinsky album (formerly released in 2006 as an SACD). (I've got an Argerich Chopin set in Dolby Atmos on order.)
HOWEVER, Apple's recent foray in "spatial audio" has resulted in the release of a number of other titles from Warner, DG and Decca in the Dolby Atmos format - exclusively available via Apple Music for now. Even more noteworthy, the Gramophone Awards 2021 has a new category this year: "Spatial Audio". And just by coincidence (LOL!) Apple has a full-page ad in that hoary publication, offering congratulations to all of this year's nominees "from your friends at Apple"!
And the nominees (in the "Spatial Audio" category) are. . .
Bach: WTC II - Anderszewski (Warner)
Dvorak: Cello Concerto - Soltani, Barenboim, SkD (DG)
Elgar: Cello Concerto, Enigma Variaions - Kanneh-Mason, Rattle, LSO (Decca)
Ives: Complete Symphonies - Dudamel, LAPO (DG)
Josquin et al: "The Golden Renaissance" - Stile Antico (Decca)
Rachmaninoff: Symphony No. 1, Symphonic Dances - Nezet-Seguin, Philadelphia Orchestra (DG)
(BTW, I agree with you about the opera blu-rays from 15 years ago!)