The only thing better than new technology is old technology. Add the term "vintage," price it at a premium and watch us geeks drool. Generally, sports technology isn't old enough to go retro; Adidas begs to differ with the return of its 1984 Micropacer shoe.

Predating today's growing pedometer obsession by two decades, the Micropacer was the first shoe to implant a microchip in the big toe area, which registered steps each time the wearer pushed off.