As Chinese, I would say, the scale and speed of China getting rid of cash is truly impressive and makes me proud, but, in US, with credit card and Apple/Android Pay, I am pretty much cashless as well. For me, the achievement of mobile payment is social-economical, that is more about how companies could persuade customers to adapt a new way of doing something than inventing some ground-breaking technology.
In case of China, put it into another perspective. Chinese banks have long been state-owned and very ineffective. Credit cards are incredibly difficult to apply, and cumbersome to use after you get it because the banks refuse to pay you back in case of frauds. This is why WechatPay/Alipay could be so successful:
1.There is no existing dominating technologies.
2.It mitigate the fraud problem that it is harder to stole/clone your card.
3.The onboarding process is really easy.
All in all, I think mobile payment takes off in China is pretty logical, while in other countries, like Japan/South Korea, it is not common at all, even though they are close to China culturally and their economies are considered to be more advanced than China's. This is a classic example of second mover advantage, that China could enjoy this great leap forward, only because it is not advanced enough before so doesn't have all the legacy to carry along.
However, I agree with you that US needs to ditch the illusion, that it is still the norm of innovation and others should follow. The world is getting diverse once again after the cold war, more and more innovations will happen elsewhere, like in East Asia or India. Time to let go of that useless ignorance and set down to truly listen and, learn.