Chart - Mobile Device Payment Transaction Value, 2011-2016

Proximity mobile payments are not yet very popular in the US—eMarketer estimates that such point-of-sale payments using a mobile phone as a payment device, whether via near-field communications or other contactless technology, will total just $640 million this year. But that’s an increase of 283% over last year’s even smaller base, and a number that will rise a further 234% by the end of next year.

By 2016, proximity mobile payments will have exploded in the US, and total transaction value will hit $62.24 billion. Read the rest at eMarketer.