Technological progression always looks like a straight line in retrospect, but only because we ignore the supposed sea changes that fail. Movies were black and white without sound, then black and white with sound, then color with sound. But what happened to Smell-O-Vision? And five years after Avatar, why hasn’t 3D completely taken over the way we watch movies instead of being a declining sideshow? On the one hand, it’s easy to see the progress from early cell phones to modern smartphones. And yet, the fact that it was phones that progressed that quickly instead of, say, consumer vehicles (still no flying cars?) would shock time travelers from as recently as 1994.

–Lincoln Michel looks at the future from the past.