NFC-TAN is Display-TAN without display, and with NFC instead of BLE.
The main adavantage of NFC-TAN as compared to Display-TAN and every other Online Banking method are the costs: nearly zero costs for the bank in case they have already NFC enabled bank cards.
The disadvantage of NFC-TAN as compared to Display-TAN is that it is less secure and that it does not work with iPhones.
NFC-TAN was presented at CeBIT 2013 by GFT Technologies and Tübingen University.
March 2013, press announcement GFT: ''Smartphone meets debit card: NFC-TAN makes transactions secure and straightforward''
March 2013, Computerworld NL: ''Zo beveiligt NFC internetbankieren''
March 2015, NFC World: '' Korea shifts to NFC authentication for mobile banking''
July 2015, The Drum: ''Lloyds trials tap to bank mobile banking service''
Unfortunately these implementations were done without us. The fact that others independendly have the same idea just shows: NFC-TAN is a natural and convincing principle.