I don't see Apple 'press releasing' a new product line such as tags or headphones - they are 'event' releases. Certainly an updated Apple TV or AirPods 3.0 fit the bill easily.
While I don’t think that it’s AirPods Studio, I can’t deny that the AirPods Pro were announced via a press release last year, with absolutely no fanfare. So it’s not that unlikely.
It’s either a 16 inch MacBook Pro or AirTags.
Those are the only two devices that Apple has specifically mentioned in recent iOS 14.3 code, in the case of the air tags, and the latest final cut pro release notes, in the case of a late 2020 MacBook Pro 16 inch.
The last we heard about a new Apple TV was back in the summer, and it was set for the first half of next year, with either an A12X or A14X processor and a new remote.
But there has been betas for tvOS14.3, but no new lines of code for updated Apple TV models, so if that was coming, I feel like we would’ve heard about it by now.
As for a new full-size HomePod, A new iPad mini, or any other product that has been suggested in this thread, not a chance.