Here's a vision of the not-so-distant future:
_Microchips with antennas will be embedded in virtually everything you buy, wear, drive and read, allowing retailers and law enforcement to track consumer items — and, by extension, consumers — wherever they go, from a distance.
In truth, much of the radio frequency identification technology that enables objects and people to be tagged and tracked wirelessly already exists — and new and potentially intrusive uses of it are being patented, perfected and deployed