Nice to see some of your suspicions confirmed by others, isn't it? Especially if by Dilbert. I cell phone but I don't smart phone. Have never really seen the advantage to being immediately accessible to others at their convenience, nor the need to interface with something while out doing something else. In fact, as a young traveling resource many years ago, I had the early opportunity to observe that much of frantic demand for immediate attention came from others who neither needed such access nor warranted it. There are exceptions, of course...family and such.
I've sat at conference tables in recent years where something like shown below actually took place.