It would be great if there was an "All Tabs" Menu that listed all tabs open in the current window (and optionally all tabs open in all windows), accessed via a drop-down arrow next to the New Tab button, like Firefox used to have.
It would look kind of like this, but better integrated and in the tab bar:
@F-Lambda, would you want this as a button, or would you rather a setting that allows you to select a vertical or horizontal tab band? We recognize that for power users that have a bunch of open tabs, the current solution is far from ideal, and are looking at several possible ways to give users better ways to manage their tabs. Thanks - Elliot