One additional thought. I just finished a masters level course in "Leadership Development and Coaching." (It was an MBA course which I took as an elective in my program.) The instructor used a Skype like service for a couple of the classes when either he was going to be out of town or when a guest speaker was out of town. The class interaction for the online sessions were far lower than the face to face classes. I was one of the few people who actually interacted, and I'm 53 years old. Most of the students were in their early 20's, so you'd image that they were more technology friendly than I should be. (But I may be a special case.)
Face to face is definitly more effective. But it may not be worth the additional cost in some cases.
I actually thought this strip was bashing the engineering mindset. (Maybe Scott wants to allow the Pointy Haired One an occassional time when he's right. After all, even a broken clock is right twice a day.) For a small percentage of the population, Skype works as well as face to face. And for a larger portion of the population, the efficiency of Skype overcomes the less effective nature of the communication. But that still leaves a large portion of the population who find face to face meetings more effective than Skype, telephone calls, emails, etc.
Since Dilbert is undoubtedly in the Skype Friendly portion of the population, he's having problems understanding that the rest of the world either exists or is worth talking to. Life is constantly !$%*!$%*! the balance between efficiency and effectiveness.