There are of course millions of cheap, junkie, childish graphics and images available from many sources all over the Internet. They give your audience the subliminal message that you have a cheap, junkie and childish presentation. It is worth the time, effort and money to seek out and use powerful, clear images. It sends an instant message that you are a pro and you know your stuff.
This slide uses one of my favorite techniques of adding a short general headline to a full image slide. It sets the stage while still allowing the presenter to speak as much or as little on the subject as is appropriate for the specific talk.