If engines could incorporate the WAI's guidelines into their algorithms, it might be more appropriate to penalize sites with accessibility issues and, similarly, reward sites that meet or exceed requirements. Perhaps this could be another tool to determine the quality of content. He implicitly links this concept to usability. The allure of the doorway will fade. Already, in my own SEO business, I am approached more and more by jaded doorway-page users, tired of the overblown guarantees that never materialized.
High rankings are only one part of the mix.
This is a good time to try to place SEO in a new context and learn how to better sell what we do by discovering our true value to the client. In our analyses of the optimization challenges within Web sites, we can also give valuable feedback on a site's accessibility and even usability. We have a contribution to make to the bigger picture. Voice your opinion. The problem is getting to it.