Google to Drink a Milkshake

Google Plans to Introduce a PC Operating System

In a direct challenge to Microsoft, Google is expected to announce that it is developing an operating system for a personal computer based on its Chrome browser,
according to two people briefed on Google's plans.

The move would sharpen the already intense competition between Google and Microsoft, whose Windows operating system controls the basic functions of the vast majority of personal computers.

My guess is that if it is FREE - Microsoft is going to be kind of angry about this.