I had an epiphany this morning that frankly has taken me by surprise. I realize I am fully 90 percent post-PC, without making a special effort to get there. A lot has been said about the “post-PC” era and what exactly that means. For me, it means that I now can do at least 90 percent of my work and play on a mobile OS-running device. The Windows PC/Mac has largely been kicked to the curb.