I always found DNS to be one of the most compelling uses of the blockchain. Namecoin actually did a great job at this. Effectively if put into practice, ISPs w

I always found DNS to be one of the most compelling uses of the blockchain. Namecoin actually did a great job at this. Effectively if put into practice, ISPs would run name servers that effectively mirror the whole DNS system via blockchain. And if you really wanted to have ultimate privacy you could run it locally on your machine and there would be no way for anyone to know what domains you've looked up.