For many folks, myself included, the spirit of emacs is to avoid the mouse. That particular screen looks like it was designed to be used with a mouse.

I agree that eclipse is a useful tool, but I don't think it has much in common with emacs. It feels strange saying this about editors, but they embody completely different notions of how programming is done.

For example, when I pull up a file in emacs, I intend to read the code. Eclipse users tend to load the file and then examine the structure tab, looking directly at the method definitions. I've seen eclipse users ignore my comments because of this structure pane (and not reading the code file top to bottom). These editors definitely put us on different wave lengths :)