The Pen is Mighter than the Keyboard

Like I said In a recent Writer's Blog this began as an exercise in class.

The Pen is Mightier than the Keyboard

My page is blank. So many possibilities; centaurs cantering over a hill, starships, fleets, empires, principalities, wizards, warriors and werewolf - It's still blank.
A part of my mind says 'write, just write and see what happens. This isn't my first writer's block - I've been here before - I know the patten. I'll write so far and then go back - edit - edit - edit after an hour or so two hundred words will have been written.
What about paper?
How did books get written before the computer? I can imagine Shakespeare looking at a page of Hamlet, a beautiful script - in both scenes of the word - then he sees it, yes, he's used the wrong there! The whole page has to be painstakingly rewritten.
Now things have gone too far the other way. It is now all too easy to edit. I heard once about an author, Harlan Ellison, who would sit in the window of a cafe with a pad of paper. As he finished a page he would stick it to the window. Those who passed by the window could read what was written but Ellison had to continue to write. Editing could come later.