Rick Jelliffe at XML.com - The fall of the Desktop and the File and the rise of Topical Interfaces and Topical Documents:
"The rise of Topics represents a great challenge to operating system and desktop suite vendors. When we look at Windows, or Mac or Linux window managers, we see that they really interact with the user at the wrong level. They say that the topic the user is interested in is applications and files. But how many people nowadays start their computer interaction with a web browser pointed to Google? There are still people whose organizing topic of interest in their computer interaction is the file or application, of course, but they have been swamped by people who are interested in the topic."