Read the previous post about online virtual servers from Amazon, then consider this from Forbes.com:

Like Google , Yahoo!  and others, Salesforce is treating the Internet less like a communications network and more like a computing platform, a continuation of the dispersal of computing power from a mainframe to servers to a personal computer. And like his colleagues (albeit more vocally), Benioff sees Microsoft as a computer industry chokepoint that will be eliminated by Internet-based mashups.

Will our computers become simple “Internet Application Access Devices?”