Advertising agencies are inexorably moving to an automated. programmatic  system of buying inventory and publishers who don’t automate soon, will be left behind in a sort of “tale of two cities,” warns Jay Sears, GM of Revv at the Rubicon Project, the LA-based ad tech company that automates buying and selling of advertising.

Sears moderated a session at Advertising Week about programmatic with most of the heads of the agency trading desks, We spoke with him afterwards.