 My hope is not that people feel guilty or depressed. My hope is that we understand what to take is really like fully our way of life. The future of food. That's next time on the TED Radio Hour from NPR. Saturday afternoon at 2 and Tuesday night at 8 on KUAR Little Rock Public Radio. Thanks to digital price tags, retailers can now change those prices instantly. And the in-store shopping experience might be about to change completely. That is next time on Marketplace.