“Sex drives technology” is a corollary of Kewney’s Law, named after UK IT journo Guy Kewney. His claim was that no new technology is truly established until it is being used to shift cheap porn: VHS vs betamax, JPG vs GIF, webcams, broadband, the examples are extensive.
Kewney’s Second Law is the VHS vs betamax case, where if one option between two new technologies favours cheap porn, that will be the one that wins out.