Their major responsibility will be to transmit their knowledge in the most effective way possible to the front-line teams. The roaring 2000's. I think it's a quote that everyone in the interface design business should read and contemplate. Jargon is out, communication is in. This is the way it should be, but unfortunately every field of study creates its own terms and specialized words.
Psychology is one of the major offenders.
Interface designers of the future will not only be expected to expose deficiencies and weakness in the interface they will have to propose solutions. Weakness will be remedied with strength, confusion will be remedied with organization, and frustration will be remedied with simplicity. Problems will be identified and solutions will be proposed. Too often I see usability professionals hide behind a wall of jargon. This is just not so.