Vim and emacs are just text editors in the same sense that visual studio, eclipse, netbeans and so forth are just text editors.
Offhand, the only feature I can think of that eclipse has that vim doesn't is the ability to display images and graphs - all the normal editing features (auto completion, code folding, syntax highlighting, integrated debugger, file browser, plugin system, remote editing, integrated repl, multiple editor buffers, compile&run function, etc etc) can be enabled pretty easily. Also, you can run vim and emacs over ssh - cant do that with eclipse or visual studio :)
Really, vim and emacs are full blown IDEs with all the features you'd expect from a modern IDE - except it doesn't use a fancy GUI.
Offhand, the only feature I can think of that eclipse has that vim doesn't is the ability to display images and graphs - all the normal editing features (auto completion, code folding, syntax highlighting, integrated debugger, file browser, plugin system, remote editing, integrated repl, multiple editor buffers, compile&run function, etc etc) can be enabled pretty easily. Also, you can run vim and emacs over ssh - cant do that with eclipse or visual studio :)
Really, vim and emacs are full blown IDEs with all the features you'd expect from a modern IDE - except it doesn't use a fancy GUI.