This could be a great hit for them. The challenge with Mpesa has been the STK issue. If they are able to integrate Mpesa to the NFC Sim card, it means they will be the leaders in Matatu payments, supermarket payments, etc. That way they will be truly unbwogable.
ION, the reason why Mpesa does so well in this market is coz banks think its easier to work alone instead of together. I wonder why I should withdraw money from my account to Mpesa so as to be able to send to someone else real-time. If banks were better inter-linked, they would easily by-pass Mpesa.