This article rather misses the point, to use ApplePay, hold finger on scanner while placing said phone on payment terminal, payment made.
To use MCX, start phone and open, activate MCX app, use camera to scan QR code....much clumsier and less efficient. And have you seen the demo receipt printed, it's about a metre long with "free" coupons and advertizing.
As others point out above MCX's point is to allow your transactions to be compiled for marketing purposes and to enable targeted advertizing via the MCX application. Add the lack of security and the legal liability for incorrect transactions and you have a slow motion trainwreck in the making.
ApplePay actually looks like the sort of payment system we might like to use so let's hope it at least gets the chance to be used. If it fails to live up to the expectation it will fail soon enough.
Biting the hand that feeds IT
