Like on Chrome OS (which I've never used by the way) it's meant to be all about the cloud, how would you transport files between different web apps?
Eg I draw a flowchart in Creately, on a normal desktop I'd have to download it as an image file, and then upload it to Google Docs so I could embed the image on a word document.
But on a cloud-based OS, how can you download it to the local computer, which you're not meant to be able to do as that defeats the point of the cloud a bit?
Why hasn't anyone come up with a common protocol to enable web app <> web app communication?