

Oh I’m not saying it is technically impossible, it’s the opposite actually, it’s developing extremely fast. And usefulness and having QCs in our homes aren’t that far apart to be honest. Why would John Doe have a QC at home if he’s not trying to create a new medication, or simulate a molecule? Probably for the same reasons he doesn’t have an MRI machine in his living room :)
Yes they will probably never replace them because they’re actually slower than classical computers in doing simple calculations.
Quantum ML is actively being researched. However I am not informed at all about the advancement in this field specifically.
But the good news is that it doesn’t need to be portable, we can use them just as we do right now with remote access!