Technological convergence and dematerialization's impact on energy and materials In 1991, the electronics retailer RadioShack ran an ad in the paper for the devices it sold.  Today in 2025, the ad seems like an artifact of a bygone era, as the ubiquitous smartphone has replaced all those electronic gadgets. Technological convergence, or device convergence, is when multiple once-separate tools or devices are replaced by a single device that can perform all the previous functio