When I drove the autobahn in Germany with no speed limits, believe me you do not fall asleep at the wheel and there is simply no time to take that call from Aunt Marge. I think this philosophy applies in all areas of life. People are looking for ways to stay locked up in their little rooms and meet people and communicate. One interactive piece of communications gear they had overlooked was the good old telephone. I have also seen people send e-mail to people in the next office.
People come preloaded with all the software it takes to interface interactively in real time.
So instead of sending that voice mail or e-mail take an extra doughnut and your cup of joe and talk to Ed in cube 36.