I'll be curious as they do already have Spotify Connect from their own app and desktop.
Also curious if it ever goes full blown hi-rez, or if they just stick to CD quality for any given length of time.
Since Joe and Jane Mainstream seem perfectly happy with 256/320kbps quality, I don't blame Spotify for taking the intermediate step of CD quality first, as the audio enthusiast market is relatively small.
I could also see this being another step in the record label's plans to return the crown jewels to the vault, and institute their previously confirmed plan to go with a "one deliverable approach" to all streaming services, likely 44.1/48 kHz content, perhaps upsampled into fake hi-rez with bullshit MQA.
It also won't surprise me if Spotify buys out either TIDAL, Qobuz, or Deezer at some point as it doesn't seem the little guys are going to be able to compete forever.
By all accounts every streaming service including Spotify, which is the largest, all lose a lot of money every quarter. While Amazon and Apple can put up with that probably indefinitely, I'm not so sure anyone else can, least of all the smallest, so Deezer, Qobuz, and TIDAL all look like acquisition targets at this point for the likes of Spotify, if not Apple, or Amazon too.