I just read this on Fast Company:
even the most fluid, thoughtful electronics introduce too much friction into the process of thinking, writing down, then thinking further out.
I couldn't agree more, and I recommend you check the whole article out.
I am one of those guys who thinks and says the craziest shit, like some sort of tourette's for random ideas, and of top of that I have an obsession for writing them down. While I used to do it on Evernote, now I carry a notebook with myself all the time (Evernote, on the other hand, is genius for web clipping).
The fact is, I consider myself a techie. But I'm also a productivity geek. And while I love to read on a screen or even index most of my life on my computer/smartphone, I'd say paper is still one hell of a partner for ideas.