We are all Cylons now

IO9 rounds up a bunch of fan theories as to who the final Cylon is. One line of thought, that I've contemplated in my own idle moments, takes the "all this has happened before" slogan to mean that real humans are long since gone, and everybody on the show is a Cylon, some just thinking they're human. At least it would be better than the ending of M. Night Shyamalan's The Village.