NEW YORK ( TheStreet) -- With 56% of U.S. adults owning a smartphone and another 35% of Americans 16 and older owning a tablet computer, according to data from the Pew Internet Project, the traditional bank branch system is bound to change. In fact there's been a 50% rise in mobile banking use over the past year, according to Accenture and its Retail Banking Survey. "There is little question that branches remain important in the minds of US consumers," says Mike Goodson, director of management consulting for Accenture's North America banking practice. "They are cited as the No. 1 reason for loyalty, and eight out of 10 consumers see themselves using branches as often or more often in five years' time." Branches account for 60% of all bank products sold, and U.S. banks continue to spend $50 billion annually on their branch networks.