Easter Sunday, my wife and I took the kids over to her parents’ house for dinner. My father-in-law, a computer engineer, is one of those people who love cutting edge technology. He bought the original iPhone on its release day, hooked a TiVo to his TV before I knew what a digital video recorder was, and became the first person I knew who dropped his landline telephone in favor of just a cell phone. So it was no surprise to walk in the door and see he had the iPad, released the day before, standing on the mantle displaying...