I can see it going either way. I think it's gonna come down to apple and Google getting on board. If they adopt tap to pay with this system vendors will have less incentive to accept credit card fees. If they don't, it won't become ubiquitous enough for any store to get away with not allowing it and consumers will look out for their own interest to keep taking the credit benefits. (I realize collective action would make that argument void, I doubt true collective action is possible in any senecio.)

That said, I cannot see a world where the banks let it get that far. This system relies on the banks cooperation and it wouldn't be the first time they bought a law.