What of 1984, the preposterous fiction that couldn't possibly be true... except now it is, in some places more than others. England is heavily wired with CCTV, China has just purchased a massive surveillance system to try and one-up even that, the US, well, that's a different thread.
What about Animal Farm, why, that's just craz- oh wait, the USSR.
Believe it or not, it's possible for fiction to serve as a warning of things that, left unchecked, will come or are in the process of being made.