China's are extremely effective so while they don't work well here, its a very different ball game since they are getting involved with a country with the tech that can literally track someone's entire trip even if they try covering their face. (See what Hong Kong protestors have to do to prevent recognition by cameras to include having projectors projection map a new face every ten seconds).
The biggest benefit though of the facial recognition is you don't have your cards, you don't have cash, you don't have anything really on you. So you go through the park and you see something you want. You use face recognition to buy. It makes buying things so simple you can end up spending way more money than anticipated because you aren't going to think about it unlike magic bands which since you have to tap. You will always wondering if you tapped too much that day.