MDG, an ad agency in south Florida, have put together an infographic to try and illustrate the changing scope of advertising. It's quite a challenge! Advertising has become almost atomic with so many micro-niche areas of interest and the rate of change is only for people who hunger for it. In some cases, the work ad agencies should have been doing last month has very little resemblance to the work they should be doing this month.
Yeah, this infographic might be a simplication but I still think it illustrates the changes well enough to make the point. I also notice the use of "Outbound" and "Inbound" in the graphic too. The Google VC backed HubSpot will be pleased.