Google Similar Images

Google Labs has a new application, Similar Images, which will find images similar to a given image. So, is this making life better or worse for photographers?

Better:  Possibly find unauthorized use of your images. Better:  Possibly making it easier for someone to figure out who created the image (important for Orphan Works legislation) Worse:  Someone doesn't like what you are charging to license an image, find one exactly like it... I mean, not like mine... my images are solely unique.