By one expert's prediction, within twenty years half of Americans will have body implants that tell retailers how they feel about specific products as they browse their local stores. The notion may be outlandish, but it reflects executives' drive to understand shoppers in the aisles with the...

A revealing and surprising look at the ways that aggressive consumer advertising and tracking, already pervasive online, are coming to a retail store near you By one expert's prediction, within twenty years half of Americans will have body implants that tell retailers how they feel about...