Waving your phone to pay for stuff is just around the corner. Apparently your phone is as secure as anything in the universe. It can move money.
And yet, I am typing usernames and passwords into my phone all day long. Type, retry, type again, reauthentication, sorry Google, sorry Facebook, sorry Apple. Why on earth are we logging into phones when our phones are supposed to be so secure?
Buying something ON my phone is harder than buying something WITH a phone.