From http://lists.w3.org/Archives/Public/public-comments-wcag20/2006May/0119.html
Following these guidelines will also make your Web content more accessible to the vast majority of users, including older users. It will also enable people to access Web content using many different devices - including a wide variety of assistive technologies.
1. Older users are within the remit of Web accessibility inasmuch as they are people with disabilities and in no other way.
2. We are not writing accessibility guidelines for devices.
We have modified the introduction to make clearer the relationship between aging and disabilities, and we have removed the reference to other devices.