Quantum circuits aren’t general-purpose computers—they’re added to conventional computers to allow them to perform a small handful of algorithms more efficiently. I don’t believe any of those algorithms would benefit the basic features of an operating system enough that it would make sense to modify an OS to require the use of one.
(Although I could totally see Microsoft doing something like only licensing their circuit’s drivers to run on Windows.)
Seriously. There are a lot of parallels between GPUs (or NPUs for ML inference) and quantum processors in terms of being architected towards a more specialized form of computation and I could totally see QPUs being a thing in the future, probably mostly for number cruncing (see Grover/Shor's algorithms). Though if Grover search suddenly becomes the way of quickly searching for files or something, who knows, maybe this might be more useful for general computing than we think.
In the 80s no one thought computers would be something normal people would use at home, they were seen as a tool for mathematicians and nerds. Now look at the world today. Who knows what the future will hold.