I've found that face/retina scans are usually bad UX, especially if you need to use a viewfinder or a statically positioned device. Apple's Face ID works well because it's on a mobile device and you don't have to align your face in a box.
I don't see how this is any more convenient than using a mobile wallet. In fact, it looks less convenient than using the actual card - even if you forget the card you can usually just key in the number at the terminal.
I don't see how this is any more convenient than using a mobile wallet. In fact, it looks less convenient than using the actual card - even if you forget the card you can usually just key in the number at the terminal.