While I appreciate the attitude so far I don't see too many applications redecentralization might be useful to. Yes, it's more fault-tolerant. Yes, it would for the most part avoid mass surveillance.

However, decentralized systems are also much more complex to build. So far, decentralized approaches in most use cases provide too little value for most users to really make sense economically. Privacy, fault-tolerance are certainly very important aspects. Unfortunately, in general most people couldn't care less. Despite some public outrage the NSA, GCHQ and the BND are still very much in business and doing as fine as ever.

Are there any applications particularly amenable to a decentralized approach? Quite likely. Is a decentralization a generally applicable model of the way we do our networking? I'm not so sure about that. Having a decentralized social network for instance would be some achievement but what benefit would it provide to the not-so-privacy-minded?