It's the conclusion of Dawkins' The Selfish Gene and The Extended Phenotype. The Revolutionary Phenotype describes the transition of life from protein self-rep

It's the conclusion of Dawkins' The Selfish Gene and The Extended Phenotype. The Revolutionary Phenotype describes the transition of life from protein self-replicator (no known current ancestors), to protein-RNA tangos (no known current ancestors), to RNA replicators (current RNA viruses), to RNA-DNA tango (RNA-DNA reverse transcribing viruses), to DNA replicator (biological life). The next revolutionary phenotype (let's call it RT) would be one that replaces DNA, first via a DNA-RT tango (machines editing our DNA) and eventually with RT (the machines) replacing DNA completely. The video I linked above goes over the consequences of this. The book will describe it in more detail, and is slated to be released next month.