Chrome OS, Present and Future
Many readers are submitting stories related to Google Chrome OS. ruphus13 points out a GigaOm opinion piece about how, if users end up rejecting its current cloud-only focus, the nascent OS may succeed as a netbook secondary operating system alongside Windows (in company with secondaries based on other Linux flavors, including Android). Engadget reviews a Chrome OS on a USB key setup that is claimed to offer eye-opening performance compared to running under virtualization. And an anonymous reader notes the 0.1 beta release of ChromeShell, which installs a "Chrome OS-like" environment that boots to the Chrome browser in ~3 seconds; users can switch to Windows later as desired.
If you read the linked ChromeShell page, it says it goes from standby to the Chrome browser in 3 seconds.
It actually takes 30 seconds to boot, which isn't much better than Windows. Actually, is that even better?
Perhaps you should consider reading up on how Chrome OS is designed. The argument you posted above sounds like you're applying the same kind of logic to Chrome OS that you would to any other flavor of Linux. Chrome OS is actually an entirely different ball game, and fundamentally does not let you install software on the machine. This and other design considerations make it radically more secure from security attacks than conventional operating systems.