Sexbots seem like a very marginal pacifying factor compared to pornography. The technology is eons away from anything comparable to actual females, even then it doesn't solve the existential problem of being an evolutionary dead-end in any way.
My take is we'll just get a whole lot more paranoia & capitalism in the mating market. It's unseemly to mention but there's a tested and proven way to resolve the issue of male surplus. Disorganized incel terrorism might just be the prelude.