Very often when i am surfing around here, or when i've looked at e.g. Transformers, Games.wikidot.com etc. i find myself reading about something, e.g. a game, without any kind of screen-shot. I think images would really be in it's place sometimes, both of screen-shots, but certainly also when explaining some concept. Let's face it, sometimes a picture says a thousand words.
For example on these pages it would be nice to have an image or illustration:
And just info pages like