A question which is more interesting then the possible answers...
that is an advantage

I rather like the screen saver approach

I like the brain conditioning, but also the screen saver approach is an interesting take on it. Since I never well, almost never remember my dreams, the few dreams I remember are usually vivid when I awake, but quickly thereafter, I couldn't relate any of the details. I've always wondered if its not the brain's way of shredding paper!