Google is a
Big Brother. He can see whatever you do. He records all your searches. Especially if you're signed in. And you have to be signed in for having this lovely background image. Well it's all automated. But you are there, open as a book whenever they need to check on you.
They say they respect your privacy. If you believe of course.
Well I believe they do. But the fact that all your history, everything what you've ever done through Google, is safely saved somewhere for all times, well to me that's a bit disturbing.