I have the nasty feeling I'm being trolled, but ... try watching these to get a feel of what a proper programmable editor is capable of:
* https://vimeo.com/13158054
* https://vimeo.com/30721952
Basically, the idea is that your editor becomes your entire world. News, email, chat, source control, code, running code ... everything merges into the one system, and efficiency gains in one area tend to be applicable to others.
All your keyboard accelerators, macros, etc. etc. are available to all functions. Want to kill to the end of the line? It's C-k ... in everything. In your editor, in your email client, in your scheduler ...