I was hoping to see more paradigm shifting user interface ideas. I think those exist inside Apple Park, but are waiting for their time. It's telling that this was announced at the developers conference. The focus now is on the platform, and I think mind-blowing user experiences will come later. (At least I hope)
Creative Selection by Ken Kocienda is the closest, modern look inside Apple's product development that I've found. Focus is on the development of the software for the original iPhone and is a great book.
15 minutes of randomized phrases. There are better tools for malicious voice cloning. Seems pretty safe. And Apple has put more tools into AirTags to prevent malicious uses than any other tracking devices. And to your last point, Apple is concerned, they are running it all on device and trying to make it as safe as possible while still being useful.
I can understand to some degree only manufacturing one physical product and limiting it to create multiple retail products. And once you do that it only makes sense to allow people to "upgrade" after delivery. But I am really not sure why they'd want to do a subscription rather than a one-time purchase? Is it just to get better conversions? Is it because they want a recurring revenue stream (it can't be _that_ big for their business)?
Existing AR apps lack stereoscopic support and lack interaction model needed for this. But wouldn't be hard to add support for this. Basically just a presentation and UI level change.
I find this product fascinating. The design looks ugly, but I can see how they got there. Mixing the real world and iPhone display in the way they are is super interesting. As is the decision to leave the edge of iPhone for touch input. Also interesting to see them leveraging Apple technologies so heavily. I can't really see this gaining any real market, but I like some of these design choices.
It would be really interesting if 1Password or another could have an "email client" that just looks for these codes/links the same way iOS/macOS look for messages 2FA codes