User Experience Design- The Evolution of a Multi-Disciplinary approach

First there was the Programer, then came Business analyst, followed by an Account manager, followed by a front-end engineer, followed by Human Factors specialist (UI guy), followed by a Graphic designer, followed by a Information Architect, followed by Persuasion Architect. What next?

A crisp 4 page pdf on the evolution of a multi-disciplinary approach to User Experience Design.