Every time I use Apple Pay at Whole Foods, for example, I still have to
sign. (You try getting out of Whole Foods spending less than $50). T

I've used PIN to set the payment when I use my phone rather than signing.

MCX will fail for one reason the ACH method of attaching their account to get around the fee they pay. That's why not one bank has signed up at this point. The merchants can require the use of debit card to initiate the payment like Costco does when the consumers wants to pay with their own card. One bank (RBS) is already using a payment app for payment using the NFC. What the merchants wants is their own payment system furthering fracturing the current payment method which slows adoption in comparison to what Canada and Europe did decades ago.