The reason why this is totally different from adblock is that this draws attention to what is fuzzed out, rather than just ignoring it completely as with adblock/hosts files... so when you see something fuzzed out, you are like "woah is that lucky charms or what?" (based on the fuzzed colors). With adblock/hosts you see nothing so you have nothing to focus your attention upon.
Don't get me wrong this sounds like a fun project though.
Don't get me wrong this sounds like a fun project though.