World: r3wp

Typists of course!

Many more typists than there are programmers requiring Control key 
on the most used rows

Modern typists use eletronic word processors with many control-key 
shortcuts, don't they?

My guess is, a typist use Ctrl more than Caps Lock.

Like Ctrl-B for bold, where Caps Lock for all capital were used on 
non-electronic typewriters.

Modern typists use the mouse!

:D

I'm afraid, you're very much right about this.

The mouse if for playing first-person-shooters, nothing else. ;P

There is a Optimus keyboard by Artemiy Lebedew tema.ru design.ru 
where on every key there is a video screen. It costed $500 several 
years ago.

Every key displays a video stream.

Like that.