I would have responded sooner, but it wasn’t until now that I came across the task to add macOS: Support arm64, which shows that there are steps that still need to be done.
I was wondering the same thing, Apple claiming that Blender will be ready for their new Silicon while the devs probably scratched their head “we are? How come nobody told us?”
I feel they just wanted to mention a lot of different tools, being ready, to not let on about the reality that most are not yet.
Is there some official roadmap for support of the mac ARM64, or “M1” as Apple calls it? The hardware might be less impressive in real life than in the presentation, but even then it would be pretty impressive.