They (including Apple) told us once too often that their new fingerprint sensor will now really, really, finally solve all issues. With every new generation they tell us that all flaws of all previous generations have been solved. And once too often, they we proven to be wrong.
So I agree with zwp (not sure why he was downvoted):
I wouldn't put too much faith in fingerprint readers.
If they'll move to the new optical sensors the the refracted IR ones can sense the flow of blood in the veins of your finger.