When some NFC technology as in the latest Visa cards [1] will be integrated in phones, then it would be widely use.
Especially if the NFC payment works even when the phone battery is empty.<p>[1] <a href="http://nfctimes.com/news/visa-europe-contactless-transactions-continue-rapid-growth-2013" rel="nofollow">http://nfctimes.com/news/visa-europe-contactless-transaction...</a>
Unfortunately, for a customer today, paying with a phone has barely any benefits over paying with a credit card. Mobile payment systems need to offer more benefits to people to get them to use them.
Apple disallows Bitcoin.<p>Android has secret "Master Keys."<p>Google and Facebook monitor my entire online life.<p>And I'm supposed to use my phone as my wallet, too?