I would say that a positive effect of sex robots could be the reduction (and possibly elimination) of female human trafficking. Overall, I don't think people will just abandon human contact, but the underserved segment of people who already struggle with those social norms will have a better outlet - rather than providing a market to a horrible and dehumanizing industry.
I hope you are right, but I am also halfway expecting to see someone complain at some point that sex bots are just another form of automation taking our jobs and yet another reason why we need basic income.
