These Partial Quantum systems contain ‘noise’ (from sub-atomic interactions / physical-world artifacture (is that even a word?), etc), and suppression of this noise is one of the major challenges in building viable quantum computer systems. However, a gaggle of folks like Hugo Cable are now theory-extrapolating that maybe Quantum Discord properties can be exploited to create what we might call Partial Quantum devices – hardware that adds a quantum-ish / quantum-like turbo-boost to existing tech, sensors, etc.
Apparently, the DQC1 quantum-'computer' model seems to work more efficiently than existing digital-computers when more data is added into the mix, even though only one qubit is noise-protected and others aren't. (This is the earliest mention of this phenomenon that I could find).
But Quantum Discord and any of the so-called ‘quantum enhancement’ properties it appears to bestow are still controversial, to put it mildly. A number of researchers are critical of the design of experiments that seem to demonstrate it has any practical or ‘real’ physical-world effect.
Anyway, watch this space.
Or, rather – don’t – as doing that may, er, inadvertently effect the eventual outcome.