Sony LDAC is 200+ ms of latency. That’s fine when you’re just waiting an extra 200 ms for non-interactive content like a song or movie, but it’s FAR too long for anything you’re expecting to have change as you turn your head, which is the use case the engineers are talking about.
Apple’s audio engineers likely already have it figured out, they’re just being coy.

And, when you think about it, they have not only devised a “Spatial audio” solution by themselves but also have more of those spatial audio devices in actual customers hands (and ears) than any of their competitors in that space.