When I was a teenager, I marveled at the future. According to most futurists, scientists, and—more importantly—movies, by now I’d be getting to my job in a flying car, using a “hover board” for fun, and taking weekend trips to Mars. That did not quite pan out as expected.However, one prediction for the future—that video phone calls would be mainstream by now—came true. Sort of.Not many people have a telephone with a monitor...