So I was coming back from Atlanta yesterday and, as I arrived a bit early at the gate, settled in to read my RSS feeds. I picked a spot that was far enough away from the gate not to be too crowded, while at the same time allowing me to keep an eye on the TV screen showing the flight status.After a while, I noticed that the screen, which had been alternating between the flight status and a series of Delta ads, wasn’t updating any more. Getting out of my seat to go and get a closer look, I discovered what the problem was. It was only after I checked a different screen that I discovered that my gate had changed…