In-person mobile payments, including "invisible transactions" like your Uber ride, are expected to grow from $9.9 billion in 2015 to $68.4 billion in 2021. That is a fraction of total U.S. consumer spending, which in the first quarter of 2017 reached an all-time high of $11.7 trillion.
Competing payments technologies from card networks, retailers and tech firms mean there is no one market leader yet Retailers, technology companies, and credit-card processors are working toward “invisible payments” that use IT to eliminate many – eventually, perhaps all – of the physical financial
https://blogs.wsj.com/cio/2017/06/09/competing-invisible-payment-systems-to-keep-market-unsettled/
