Just like in text serps a part of an article is presented to the user in order to provide some kind of an idea what the page is about, google must watermark our own pictures when showing to the user. There are billions of pages on the net that have a large image with very brief description. Google's (and Bings') move simply kills this page owners. Users are looking for the image and they get the image from google. How is this different from content theft? I don't want to block google image search because that's how users generally find my gallery websites, and I want it to stay that same. But that doesn't mean that I want to provide my images for free.