In the 1980s, the TV movie “The Day After” provided a glimpse of the world in the wake of a potential nuclear war between the Soviet Union and the U.S. The movie’s view of a post-apocalyptic world scared me as a child, since at the time the potential for the scenario to occur was all too real.Lately, you can hear tinges of a similar, over-exaggerated fear coming from online marketers as they describe a future without cookies.Mobile Internet consumption and tighter regulations are making the cookie less important, but marketers shouldn’t fear. The post-cookie world isn’t post-apocalyptic. Instead, it’s downright positive.