The internet already plays an indispensable role in the everyday life of billions. Yet the surface is only being scratched. The potential to bring new and more advantages to individuals around the world, and to benefit billions more people as they gain access, has few limits. Many of these benefits could have their biggest impact in emerging markets; unfortunately, these are the countries in which internet penetration and use often lag.

In less than a decade, the mobile internet revolution has overtaken the digital revolution and is still accelerating. Mobile penetration is increasing, the costs of access and devices are coming down, and more and more people in both developed and developing economies are using the mobile internet as their first - and often their only - means of going online. Let's look at the phenomenon in Europe.

Four years ago, when its little card reader attachments for phones and tablets began to show up in cabs and at farmers' markets, Square was one of the coolest, most innovative companies in Silicon Valley. That's over.

Staples says it is enhancing its omnichannel experience, including the ability to buy products online and pick them up in-store within hours, an easier way to pay online called Visa Checkout, new in-store kiosks and, for the first-time ever, an iPad app.