What do you think about the new revealed Google Chrome OS?

Yesterday the revealed Google Chrome OS.And they showed(and said) some interesting things that for me seem totally different than any other OS-es made before.The Google boys imagined a near future where computers will look and act different.Most important the OS-es will transform into browsers and compute will take place only on the internet,and data storage won’t be necessary anymore,the boot-time will be much more shorten that today and other futuristic things.And something that I’m confused about is what will happen with the viruses.If everyone will be on the cloud what will be left for viruses to destroy?What do you think about this changes,how do you think the world will change if what Google imagined will happen?