Since forever in web time the chatter has been about a new 'web OS' from Google. With the advent of rich internet applications in the form of GMail, Google Documents, Calendar, etc we're seeing the migration of information to the web, followed by the migration of the application to the web as a service.
Look at the information habits of people around you, we're relying on portable devices to access the bits of information relevant to time and space, and taking much smaller bites out of the apple..search for a gas station with the lowest price, find the number to a good plumber, send a text message to the baby-sitter. It only makes sense to re-think the relationship of all of these types of applications to the traditional desktop or laptop, or at least Google thinks so..
From Google...
So today, we're announcing a new project that's a natural extension of Google Chrome — the Google Chrome Operating System. It's our attempt to re-think what operating systems should be.
The Chrome OS is targeted first towards small notebooks (and probably tablets?) The post makes it clear that ChromeOS and Android are separate concerns, though a good deal of overlap is acknowledged. Certainly the services that would be consumed by Android are the same services that a typical 'notebook' computer would want, and many of us would treat a notebook and smart phone as interchangable for many tasks.
Intermittantly connected (a-la Gears) rich internet applications will be a key application delivery mode, whether in the form of widgets, or in full-blown browser-based applications. Combine this with a growing number of cloud services running on big grids, and maybe a web OS makes sense?