The Next Big Feature Of Google Image Search

Simple, user provide an image, or an image URL, then Google search the similar images by its similar image algorithm. This feature is much needed, and very useful. Only thing left is I am not sure how this will affect copyright or privacy.

There are countless times you don't know who the person is in the photo, or which building it is, or a specified product but no name or tag on it. Similar image search can do just that, then link you to some web page.