For a long time Android phones had the lead when it comes to paying digitally with phones in Japan and Korea. Their open NFC API allows for all sort of cool things like reading the balance of your card.
Japan has FeliCa more or less everywhere. Close to all IC cards are based around it and even in the time before smartphones, people in Japan were already able to pay with their feature phones which featured FeliCa chips. Nowadays you still need a special Android phone that supports it, though lately you can also get Samsung ones.
In Korea there are luckily close to no FeliCa terminals but still an iPhone is useless.
Providers here in Japan even started selling "NFC cases" that you put your iPhone in which then connects via bluetooth with the phone -- just so you can pay with your phone.
Bringing this in will be a huge deal. I know a lot of people who pick Android purely because they can pay with it. There are even a lot of people who have 2 phones, one iPhone that is their main phone and one purely for paying digitally.