Nice feature to have for Apple Pay update
I think it would be nice to use the location settings to help you pick the best credit card to use.
Depending on where I am shopping I use different cards for multiple reason.
Groceries goes on my American Express everyday card because for 2x the points.
It would be nice if I walk into the grocery store it would default to my American Express card.
Basically this would be like the Wallaby concept. It will know which card to charge the purchase onto to help you gain the most points.