Now that the best minds of political campaigning have shown the way forward on the bring your friends along front, the hacks are all going to take a whack at it. And they will kick that horse to death and probably decry the failure of personalized marketing.
However, there will still be the professionals who know how to use personalized email marketing surgically to accomplish a goal. Perhaps they will have to be more implicit in the future. They will also have to accept that there is a ceiling to the power of this new tool. I don't believe that that ceiling has been hit yet however.
The problem is that today most marketing is blind - completely unlinkedin from the impact it causes. I'm counting on technology / big data / analytics to change that.