Do you really think hardware, especially new hardware like underscreen Touch ID, gets developed, readied for mass-production, and released in a year? I’d imagine Apple hardware releases are typically on a 30 to 36 month (2.5 to 3 year) development cycle. (And Apple’s software development cycle for headline features is probably 18 to 24 months.) The last year or so of development is preparation for mass-production, followed by mass production in preparation for release. Mass production for the 2021 iPhones is already on-going, for instance.Why only 2022? It's a pandemic, which rendered FaceID useless (masks), come on, you had more than a year to "innovate"
Now, I don’t really see Apple offering Face ID and Touch ID in the same phone (mostly because they’d be redundant biometric features taking up valuable volume within the phone - in particular, it would subtract space from the battery and thus reduce the battery life), and I don’t see Apple eliminating Face ID, which has real speed advantages over Touch ID. I think underscreen Touch ID in a new phone might be limited to something like the 2022 iPhone SE or some other not-quite-iPhone-14 model that would be released in 2022, or to non-iPhone products like the iPad or Mac laptops, possibly the Apple Watch. (Actually, an Apple Watch with Touch ID could be a cool thing, it could, at the very least, allow Keychain to come to watchOS and simplify logging in to third party apps, allow for buying apps on the watchOS App Store without entering your password, and allow the user to require Touch ID authentication to unlock your nearby Macs and iPhones using your Apple Watch, not to mention bypassing the passcode screen when you put it on.)
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