Why can't tabs just be a visualization of browser history with the most recently used entries cached and bookmarks can go to hell (aka just be used for a hotbar)
I can't understand the tab thing when history is pretty easily accessed in modern browsers... but it's common enough not to judge too harshly.
It is like I have a huge desk with papers that appear to be strewn across it, but actually are organized and the layout is important to my train of thought.