The news arm of GSMA, Mobile World Live is reporting that the Mobile payment market tipped to hit $780B in 2017.
This is based on a TrendForce report that cites increased availability of NFC chips and related security infrastructure as the reasons behind the larger takeup of mobile payments:
“Mobile payment multi-factor authentication techniques, which combine elements including fingerprint, iris and vein recognition technology, in addition to existing security protocols, will also help to drive adoption”
I have also seen this from an app-development point of view. More apps I am involved with are including payment integration using payment provider SDKs.