The idea of smart glasses has been around for decades, but the technology is finally catching up. A computer you wear on your face has obvious potential, not least because it leaves your hands free. Smart glasses can entertain, guide us with directions, help us document our lives, and even teach us about the world around us, but the category is incredibly varied—not all smart glasses have the same features. As a new wave of smart glasses arrives , we got sneak-peek demos of several and tested just about everything on the market. Before diving into recommendations, I’ll explain […]