It's all too easy to dismiss the optimistic fantasies of yesterday: flying cars and robot servants may have filled the pages of Popular Mechanics in the 1950s, but today we're better grounded in reality, pinning our hopes on more reasonable futures based on technology we've actually developed. Still, even those predictions fall flat sometimes, and it can burn to look back at the track record of a horse we once bet on. For this editor, that stallion was known as color e-paper, a series of dimly hued electronic-paper technologies that teased a future of low-power gadgets with beautiful, sunli
