Transformational developments are swirling around the banking industry — as they are in nearly every industry. Companies like Citigroup are reimagining bank branches. Startups like Simple are suggesting that it’s time to get rid of branches altogether. Square, Swiff, Silver, and PayPal want to bring payments processing to smaller merchants. Mobile phone companies are getting into financial services. Microlending has exploded. Companies like Facebook and Tencent make hundreds of millions through microtransactions. The mobile wallet is coming, with Apple and Google lurking in the background.