I have the same question. I hope it happens soon!

Sonos has not said anything about that, but I think it's probable.  It's a great way for Sonos to show off the capability and they can curate spatial audio that well mixed and sound good on Sonos.

One factor is the Sonos recently reached a deal with Deezer to start providing the audio for spnos radio, and I don't think they currently offer spatial audio.