For me, it doesn't look good. Why would we even need banknotes when we have smartphones in our pockets which can store our bitcoins securely? There are many well coded wallets for Android and iOS which are fairly easy to use. I understand that some people might have problems with using Bitcoin, but it's not that difficult at all if you are not interested in coin control for example. The number of available bitcoins on the banknote won't change so someone will have to scan it with NFC anyway. It's not really convenient.