This article is focused on product marketing rather than Professional Services Marketing, but it offers insights and direction communicated in simple language.

http://rishadt.wordpress.com/2013/09/22/the-dawn-of-a-new-era-in-marketing/

In an empowered age, people are exhibiting dramatically new habits in the way they become aware, consider, buy and advocate. These new habits supplement and do not necessarily in the near term replace the ways they traditionally evaluated and bought products and services. However, in time, we anticipate that these new behaviors are likely to become dominant.

The three biggest shifts are enhanced expectations, connected experiences and self marketing.