From what I understand the FP sensor only unlocks the phone, lets you buy iTunes items, and I think I read that it lets you buy stuff from the Apple store app. But I read that Apple did not release this as something developers could use in their apps. Seems like a big mistake on Apple's part. The FP sensor is great if it's for unlocking the phone, but it just seems like it's losing so much potential if it doesn't replace the entire paradigm of passwords on a cell phone. Typing on that little screen is already a pain in the butt, to be able to just use a FP sensor whenever you have to log in or sign in somewhere would be pretty revolutionary to me. My prediction, some Android phone copies the FP sensor but they implement it much more broadly to include all passwords and sign ins and they look like the heroes. I'm not discounting Apple here, I'm just hoping they give this ability to devs soon. But if they didn't announce it today that means they won't do it for a while, and that means devs have not had this ability, that means we won't see apps like this for a long time if Apple even wants this. Anyway, I thought it might be an interesting discussion.