As has been speculated by many, Google is finally planning to release a Linux based OS for PCs and Mac and those ARM based netbooks, and it is called the Google Chrome OS.
Apparently the idea of OS directly booting into an web browser is not new (for those of you who follow tech news frequently would well know of the CrunchPad from Tech Crunch). Interestingly, the site on CrunchPad's early prototype says that it runs Linux with a WebKit based browser, which sounds quite close to what Google Chrome OS is described to be.
Though it is too early to compare Google Chrome OS with now "quite mature" Windows 7, it would be interesting to know in which market they will compete. Initially I would think that Google Chrome OS will create a whole new market for it self, rather than "downing" the sales of Windows 7. As I see it, Google Chrome OS is targeted more towards people who spent a lot of time on the Web, unlike me, who also spent a lot of time over an ssh connection! I doubt, Chrome OS will have ssh client on it, though I might be completely wrong ;-) That example was not great, but I wanted to bring home a point that if you rely too much on "fat applications", for what ever reason it be (document processing, editing media files, developing applications or system programs), Chrome OS is not for you, the same reason why Sun Microsystem's Java OS was not for you.
There is a difference though. When Sun first came up with the idea of "Network is the Computer", and pursued relentlessly till the end, they always seem to fail, largely because they were way ahead of time. But that time seems to have come now. There are fair bit of "web applications" out there for a web-based OS like Chrome OS to succeed. And when it comes from Google, you know that it comes with some pleasingly simplistic and elegant UI.
Regardless of this, I still see myself moving to Windows 7 as my primary home OS, when it gets released.
(PS: For a more deeper commentary on why this release of Google Chrome OS is a "turning point", have a look at: http://www.winsupersite.com/alt/chromeos_preview.asp).