In the spring of 2007, I was one of four journalists anointed by Steve Jobs to review the iPhone. This was probably the most anticipated product in the history of tech. What would it be like? Was it a turning point for devices? Looking back at my review today, I am relieved to say it’s not an embarrassment: I recognized the device’s generational significance. But for all the praise I bestowed upon the iPhone, I failed to anticipate its mind-blowing secondary effects, such as the volcanic melding of hardware, operating system, and apps, or…