After the launch and success of chrome browser google announced the new os Google Chrome OS.
Google says the chrome was designed for people who live on the web. The operating system that vrowser runs on were designed when their is no web. And hence they are coming with new os which will be extension to the google chrome.
The new Os will be open source , light weight and will be using Linux kernel. Its seems to be promising many new things a major is fast access to every thing .
Ref : Google Blog