It will need at least a decade for quantum resistant algorithms be considered seriously or even make their way into bitcoin. Right now we have no reason to want to think about any kind of fork whatsoever.
There has been discussion of this quantum computer powers but to be honest i don't see it as a threat for a decade or even two decades. Yes, technology is evolving fast but then the developers will also come up with some sort of fork/solution. There is no need for anyone to be panic on the quantum technology.