Well I suppose I might as well jump on the bandwagon. Google has announced an Operating System focused on its Chrome browser. The core of the operating system will be based on Linux. The design is supposed to lightweight with a focus on security and ease of use. Netbooks will be the initial target platform.
This is the future of the computing, not just operating systems. More and more applications are gonna get pushed to the Net. You will access your applications through the browser and store your data on the cloud. The idea of boxed software will go the way of the buggy whip.
Google certainly has deep enough pockets to take on Microsoft. The question is, can they come up with a product compelling enough to stop folks from paying the Microsoft tax. Windows 7 is gonna be huge, but will it be the last operating system from Microsoft that matters?