All of that stuff is just a refrigerator. Because the little quantum computer chip is only the size of a credit card but it has to be kept so fucking cold it's the coldest thing in the known universe.
I am fascinated to see how this tech becomes miniturized and commercialized, 100% will be what causes the singularity, not from creating artificial people, but by becoming an implant enhancement that will almost definitely radically change how people that get it think and interact with the world around them in ways that are physically impossible for us to predict.
It will be a long time and a lot of innovations in material science until you can implant a quantum computer into a person. So much that I am not sure it is even possible (or practical)
Quantum computing is widely misunderstood by the general public, and really won't be as game changing as people think. I doubt any consumers will ever have a need for one that would justify their price.
How do you get from a couple dozen qubits to brain enhancing cybernetics? Quantum computing is fairly well understood at this point, it just doesn't scale well yet