The average size and scale of purchases is also predicted to continue, with total annual transaction values from remote digital and physical goods purchases to hit $730 billion within five years.
Juniper Research said that this is a result of greater consumer confidence in the mobile device as both a content browsing and payment mechanism.
The forecast reflects the increasing important of mobile as an eRetail channel, with retailers witnessing a marked uplift in mobile as a proportion of online transactions. Juniper Research said that average tablet transaction sizes already exceed those on desktops and laptops.
However, the report indicates that a majority of retailer sites are not optimised for mobile browsing, thus hindering potential progress in the mobile shopping industry.
"Consumers increasingly expect to be able to buy their products and services via their smartphones and tablets," report author, Windsor Holden, said. "Companies which do not offer this option face falling behind their competitors."