Banking has been big business for thousands of years, and as such, banks tend to avoid rocking the boat (subprime mortgage-backed securities notwithstanding). That is, until now. 

A consortium of banks, lead by Citigroup (NYSE:C), Bank of America (NYSE:BAC), BB&T (NYSE:TFC), U.S. Bancorp (NYSE:USB), and KeyCorp (NYSE:KEY) have joined forces to develop critical technology to pave the way for true mobile banking. 

In the video below, Motley Fool contributor Jay Jenkins discusses how this new technology could free consumers from bulky wallets and plastic cards, and how these leading banks stand to cash in.