From the way we pay for items to the way we get from point A to point B, technology is leading businesses, industries and cities into new territory. Here, a look at some of issues and ideas experts and entrepreneurs across finance, food, urban planning and transportation were talking about at The Wall Street Journal’s Future of Everything Festival on Wednesday.

When You’ll No Longer Need Cold, Hard Cash

Making payments using your cellphone is easier than ever. In fact, the process of buying something now often starts on a mobile...