It was sort of gimmicky (as were a lot of the features of the Atrix) but it existed on Android first.
Of course it never worked once I switched to cyanogen mod and I never used it even when it did work.
It's non-obvious on Android/pre-Android because software developers won't care much about an API for a fraction of an OS's market. Which is why I'd venture to guess most Android apps still don't take advantage of fingerprint sensors.
http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l...
Siri still doesn't seem to be able to do that much of note (though I haven't read through today's announcements) and a straw poll of my iPhone using friends suggests that none of them really use it anyway. I'm the same with the voice functionality on Android, though I do use the cards provided by Google Now a lot.
I'm not super familiar with TouchID and its capabilities, but is this true? According to Wikipedia, Apple announced its fingerprint reader in late 2013, not 2012, and this feature was available on a high-end Android phone (I forget which) a couple years before that (2011 if I recall correctly). I understand that "having a touch button" isn't quite a binary feature, and TouchID could have some novel elements as a product, but as I said I'm not super-familiar with TouchID. Is there something in particular about TouchID that was innovative/bleeding-edge?
That being said: I didn't have the Atrix et al (my first fingerprint reader is on my S6, and Samsung didn't even pretend they weren't borrowing heavily from Apple with this phone's design), but from what I had read, it performed pretty consistently as well. Looking up a random review of its performance:
"The Atrix prompts you to set up the fingerprint reader by swiping your left and right index fingers over it, and also asks you to provide a back-up password in case you go into the witness-protection scheme and have your fingerprints erased. In our tests, the biometric sensor responded to a quick swipe from either finger, so we found it fun and convenient to use. It seemed secure enough too, denying access to all of the interlopers we roped into our tests."
So I don't think Apple needs another iPad/iPhone to be called innovative, it can be new software features, or little hardware features. I just genuinely cannot remember the last time I've legitimately been jealous of an Apple exclusive feature. Maybe Lightning's reversible-ness in 2012? What since then? That was three years ago.