It certainly will.
it is not the case now, simply due to costs, however if one day it costs cheaper then pilots, yes for sure.
One big reason : no more limits, no more rules about flight hours duties, no complain from pilots, no calls for this or that, no strikes, no call sick, no more alcohol problems or suicide problem etc...
Actually it started. Copilots pay for working and follow strict procedures without much thinking like a robot could do it. Many things a PM (pnf) do can be done by a robot (lights, gear up, calls out, fasten seat belt...) just need to program it.
Making copilots pay, is a first step to remove copilots (at least economically).