Google Image search to get a whole lot more picturesque

I'm really looking forward to the outcome of this research into enabling users to search the Internet for images....using actual images, not "search terms".
For example, if I wanted to identify a famous painting I knew nothing about, I would upload my picture into the search engine, rather than try to explain the painting in key terms.

The next thing on my list for Google to invent is a similar search engine for music. I'd love to be able to hum something into the computer and Google to come up with suggestions as to what I'm humming. And it would also settle debates on, "you stole that song from _______", "your new song's such a rip off of _____". Maybe the Chili Peppers could use it.