A quick summary.

1. Data centers are inherently centralized, and bloody expensive. Once you have all that data in one place, doing large scale monitoring is very easy.
2. Sutherland’s Wheel predicts that centralization and decentralization take turns as “progress.” We are turning forwards to decentralization again: bitcoin, bittorrent and so on.
3. The People’s Cloud is the aggregated computer power of their online devices. Bittorrent uses the People’s Cloud to serve your files in a hurry!
4. The People’s Cloud, with appropriate security, deprives advertisers, marketers and central government of improper knowledge of our affairs.
5. Figuring out how to stop bad people using your computer for bad things is an inherent problem of People’s Cloud applications. It’s not a computing task-farm for money, I can tell you that much.