I don’t think there’s any secrecy left nowadays with Apple’s hardware, just a theatre. Their presentations are the least surprising of all tech firms - partly due leaks part due to super conservative feature development (if any).
Yeah, I remember when their hardware announcements were pretty much airtight. Up to Apple black-balling Gizmodo from all events after Gizmodo got ahold of an unreleased iPhone an employee had lost. Even then the phone was disguised inside the shell of an older model. [0]
The person that found the phone only poked around after he was confused when it went bricked a few hours later (remotely done by Apple). Then they actually tried to get it back to Apple, and got blown off. That's when they contacted Gizmodo. I think Apple was pissed that Gizmodo paid $5,000 to get it from the finder and didn't return it immediately to Apple without question or inspection.