Just before take-off, there is a moment. “At this time, please turn off all cellphones and put away your laptops and other electronic devices.” It’s a moment we say we hate, but secretly, we look forward to it. The excuse to disconnect–what a luxury. The average American spends at least six hours per day staring at a screen. Among highly educated adults, that number is even higher. We are staring at screens on our cell phones, tablets, laptops and TVs. Throughout our day, we see more screens in our cars, at the checkout, the bus stop, the back of a cab. Soon we will have screens in our kitchens, our laundry rooms, our nurseries. These screens can make our lives more efficient. They remind…