Wait, really? I thought the motion of the screensaver strengthens the screen while it's on, at least that's what I was told.
Yes, the unknown secret about a screen saver is that it creates a force field around the screen itself. It is so strong that it can survive the impact of a 50 calibre armor piercing bullet which has a velocity faster than the speed of sound. Too bad it doesn't extend beyond the screen though so while the screen itself may survive the impact, the shockwave will destroy the rest of the laptop.