Competitive Usability
http://www.guuui.com/issues/01_02.php

Olsen, Henrik
GUUUI
2002

Abstract:

Many online services on the Internet are about to enter the third stage of market maturity, where the key competitive differentiator will be usability. While many existing services are going to face costly re-designs if they what to meet the demands of the third stage, new Web projects have the opportunity to overtake competitors by making usability top priority.