This is my utopia dream .. creating advanced online Wordpress editor for themes and plugins. 

I'm waiting for Gary Cao permission, cause this is his idea. 

This link have pictures and description that can better describe the purpose and actions for editor. 
https://web.archive.org/web/20110809140550/http://www.garyc40.com/wordpress/wp-content/uploads/2011/03/Editor.png