Cloud computing may a little over-promised, but it isn't "worse than stupidity," as Richard Stallman would say. In fact, it's really a very positive change in the way we use computers. Not only does it eliminate many of the barriers to using any operating system you want, but it also takes the responsibility of storing and backing up data off of the user. This is all in a very early stage, but the glitches should be worked out in a few years.