It's nice that the EU is giving room to such innovation, but I wanted to point out that stuff like this is quite widespread in India:
Every shop on the road nowadays has a QR code you scan to make a payment using any UPI[0] compatible app. Thus, the age old problem of a shop not having change is quite rare nowadays (if you're not a minor that is, because all UPI apps are 18+). UPI is centered around your phone number, which is linked to your bank account as part of KYC. Thus, you can make a payment to anyone who doesn't even have UPI using their phone number, thus transferring funds directly into their bank account.
DigiLocker[1] is gaining popularity, with some airports allowing you in without physical ID if you have your ID on the app and scan yourself in. I've only been to one airport that does this before, and I sadly was not aware of it at the time.
It's nice that more and more countries are realizing the usefulness of this as tech becomes more and more ubiquitous and accessible to everyone.
[0]: https://en.wikipedia.org/wiki/Unified_Payments_Interface
[1]: https://en.wikipedia.org/wiki/DigiLocker