The way I understand that image: Each bar is the equivalent of a tab, and the linked circles are the visiting history for that tab.<p>The busy blue bar near the bottom shows that you visited six links, went back to the third link and visited four from there, then went back to the second of those four and visited one. The large size and white color of that one last circle means that it's what you're visiting now?<p>Or I'm totally off, and this is an alien interface in need of interpretation by Hoshi Sato.
I always wanted non linear history. Often a bookmark is not enough, I'd love to rewalk on the discovery of a particular page. Similarly, on linux, curl (IIRC) adds the source url to a downloaded file metadata.
Here's an interesting approach to tabs<p><a href="https://vimeo.com/9019483" rel="nofollow">https://vimeo.com/9019483</a><p>Watching the video makes a lot more sense than my explanation!<p>Along with the usage of tabs, you have the concept of "sessions"
A session is a collection of any tabs opened before starting a new session, by using ctrl+t.
Using this will naturally result in collections of related tabs... You can then switch between sessions in a tree-style-tabs kind of way.<p>Watching the video makes a lot more sense than my explanation!