A Reddit post notes that “apps like Circle or Coinbase [could] use Android Pay APIs to pay for purchases in stores using NFC, instantly converting Bitcoin to fiat.” Some participants in the ensuing discussion thread express frustration at the ongoing mainstreaming of the Bitcoin space and fears that it will be controlled by the usual suspects, the financial establishment and corporate giants.
I'm not a user of Circle & Coinbase, so not sure how paying via them works. Will you be able to pay via your balance on one of these exchanges? If so, that would be amazing.
Via that way you don't need to wait for confirmations, no matter how large the purchase amount is. Much better than currently paying with a wallet on your mobile.