[mstolpm]

I don't think Apple Pay will have any implications on IAP in the near future. Apple guidelines clearly show that Apple Pay is for physical goods and services, IAP for digital stuff:

"It is important to understand the difference between Apple Pay and In-App Purchase. Use Apple Pay to sell physical goods such as groceries, clothing, and appliances. Also use Apple Pay for services such as club memberships, hotel reservations, and tickets for events. On the other hand, use In-App Purchase to sell virtual goods such as premium content for your app, and subscriptions for digital content." Source: https://developer.apple.com/apple-pay/Getting-Started-with-A...