The latest trademark therefore comes as no surprise. On April 13th, Apple filed a federal trademark application for the "Add to Apple Wallet" icon seen below (WALLET disclaimed).
Apple filed this trademark in Class 009 for computer software related to organizing boarding passes, coupons, gift cards, and sporting tickets, processing mobile payments, personal information management, and verifying credit card transaction and payment information.
Apple has had success in registering icons as trademarks before and I suspect this application will be no different. Apple is using Section 44(d) of the Trademark Act to claim priority for this mark as of October 22, 2015, based on a trademark application it filed in Jamaica on that date.