I think it would be better to offer the whole menu bar as an expanded tree in a vertical strip rendered to an overlay on the whole screen. This would help the

I think it would be better to offer the whole menu bar as an expanded tree in a vertical strip rendered to an overlay on the whole screen. This would help the user get an at-a-glance view of all the menus' contents, sectioned logically by each top-level menu entry. It would also reduce menu navigation to mere up/down (and pgup/pgdown), and allow for some sort of an instant search (start typing letters) would also work. It would even work for touchscreens because we've already observed that scrolling up and down is one of the best and natural UI concepts that you can do with a touchscreen.