Apple Pay, Apple's wireless payment system, will be coming to the United Kingdom next mont with 250,000 UK merchant locations. Commuters using London transportation system will be able to use Apple Pay, too.
Furthermore, the system will be available to Discover's 50 million card members this fall, said Apple during the WWDC keynote today.
Trader Joe's, J.C. Penneys and many other retailers will be joining Apple Pay soon. Small businesses will be supported on Apple Pay through Square via a brand new reader compatible with Apple Pay that will be available in Apple Stores soon.