Evoloution's Third Replicator
newscientist.com
newscientist.com
I think it's quite likely that a new form of replicator begin on the Internet, but there's no sign of it yet.
The third replicator that will doom us all: the web (and the power it, along with all the connected devices consume).
More interesting (to me anyways): What if little by little Google "decides" to start showing us information that will lead to our destruction?
Like what the traditional media mostly does, except we trust Google, right?