"Why should Chrome be seen as an OS? Holding Shift and Escape
while viewing any page in Chrome brings up the Chrome task manager,
enabling users to end processes within the browser. That's
interesting because ending processes is a task an OS normally
performs. This and other facts have led many pundits to proclaim
Chrome is (or will become) an OS for Web apps. Those who don't want
to stretch it that far have suggested Chrome is more of a cloud
operating environment for conventional OSes, in the way early
Windows releases were graphical operating environments for
DOS."
"What does Google say? 'No, I would not call Chrome the
operating system of Web apps. I think it is a very fast engine to
run Web apps,' Sergey Brin, Google co-founder & president,
reportedly opined at the Chrome launch demo."
"And who would argue with Sergey? If it looks like a duck and
quacks like a duck, then it probably is a duck, as they say. But a
duck that, like VDC-OS, is a challenge to Microsoft
nonetheless."