So now the question is how much heavier will the Mini get with that bigger battery?
Current weight: 0.68 lb(308 g)
My guess(and hope): no heavier than 0.77 lb(350 g)
The lightest 9.7" iPad was the iPad 2 @ 1.325 lb (601 g). If it would get down to 1.10 lb(500 g) that would be amazing coming from the iPad 3/4 @ 1.44 lb (650 g).
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My point wasn't about how me or you use an iPad, it was how does the general public use an iPad. My guess is it's at home mostly, maybe I'm wrong but everyone I know doesn't have to worry about security on their iPad because they're being used at home mostly.
I still see the value in putting in the fingerprint sensor in iPad's in the future: multiple accounts(could never see Apple doing this though, they want to sell every family member an iPad of course

) or just for iTunes purchases. But the big one: iCloud Keychain! That will be huge. If I never have to remember a password and my fingerprint can unlock all my banking logins, website logins that will be amazing. The amount of different passwords and logins I have to remember is ridiculous. I've started writing them down which I know is very dangerous but some sites have totally different password requirements. I probably have like 5+ passwords mixed with different login names+login e-mails addresses.