I'm a bit divided here. First I think that using a mobile wallet on a phone is much simpler that making payments with these notes. People can just charge their mobile wallet, so that they don't need to be carrying a lot of money "on their phone", and they can then spend them just by scanning the QR code. It's much easier than carrying bills. Of course that I do understand that for some users, specially the elderly, this new way of spending money could be harder, so using this Physical Bitcoin system could help them. I don't see a great future on them, besides helping on a transition phase. They could also become some kind of cold wallet, so maybe they are aiming for that, I don't know.