This is a really cool “side” project from a Google engineer using their “20% time”. If you don’t know what that means, Google employees get to use 20% of their time on side projects that they think are useful or interesting. It it is called Liquid Galaxy.
Basically what they have done is set up a special cockpit where you can view and easily pilot Google Earth. There are eight large monitors set up so you get a life-like simulation surrounding you. You can “fly” anywhere in the world in seconds with amazing views.
Here is a video of Sean Askay from Google demo'ing Liquid Galaxy in Copenhagen.
And here is a post on the Google blog explaining the system and some history behind the Liquid Galaxy project.
UPDATE: Mashable has just posted a Liquid Galaxy demo video from TED 2010. Check it out!