In reply to DeadSkunk (Warren) :
He's not wrong though. Betamax was a technically superior product, but Sony wanted a cut for every tape sold, which made them a little more expensive (for context, prerecorded VHS were in the $120 range, blank tapes were $20-25... in the early 80s), but primarily they did not want to license certain types of content, so porn HAD to go to VHS. So people bought VHS.