The 24-bit bit depth will certainly be noticeable on well-mixed audio. And this is evidently streaming pure uncompressed audio and not on-the-fly LDAC conversion like with Vision Pro and AirPods Pro 2.
The point you make about the difference in audio quality being barely noticeable is valid. However, today’s announcement is a huge breakthrough. The lower latency enables people to compose music natively in Atmos in a way that is completely agnostic of the acoustics of their environment… for $500. I GLADLY ran out and got a pair when I read today’s announcement. I’ve always wanted some, but refused to buy because they didn’t support this feature. It really is a big deal because Apple is building an audio stack that aims to take a user’s room acoustics, noise, and sometimes even ear acoustics (with ANC / Transparency off) out of the signal chain in a package that, while expensive, is way more accessible than traditional hifi. Excited for what is to come.
Steve was a huge audiophile and I know he’d be proud.