Web Worker Daily asks if it is time for web based operating systems to be considered seriously. The answer is simple:

No. Never. The web operating system concept is irrelevant and outdated. The web simply doesn't operate the way that a desktop does. And it's worth remembering that the desktop metaphor has been used for decades because no-one has successfully commercialised a better alternative.

The reasons for this answer are two-fold:

# Bookmarks are your shortcuts to your 'applications'
# APIs are how your applications communicate with one another

This is all that's required. Both exist already.