This is actually a genius idea born in Vegas!
Hear me out:
- Spending just got a lot easier, scan the QR code and the money is there;
- The gratitude of money gets diminished because there is no objective feel of dollars (much like credit cards);
- That is a whole lot of promotion and marketing at itself, media just grabbed the story like crazy;
- Now it became impossible to clear the floor for guys or rethrow the papers -> more money for strippers.

But:
- Less shabang;
- Looks cool at first because its new, but later on it will get boring;
- Strip clubs get cyber-played - that is - weird;

Final answer: It wont hold for very long, a great way to promote though