I think Google’s timing for Chrome OS (which is pretty much the talk of the Webs this week) is spot-on. Google is promoting the cloud from the early adopter/startup side of operations. In the meantime, folks like Salesforce.com are handling the big enterprises who are five years away from being able to contemplate dropping Office and Outlook for Google Apps, but who need to be (or want to be perceived as being) cutting edge enough to get onboard with this whole “cloud” thing the kids are talking about.
I’m pretty confident that the cloud is Web 3.0; I don’t think I referred to it quite as such when I talked about the iPad back in February, but the sentiment was there. This is just one more step towards that future.