I don't think Quantum Computing has any significant practical applications yet.* But then again I'd say that it doesn't need to. From a theoretical perspectiv

I don't think Quantum Computing has any significant practical applications yet.* But then again I'd say that it doesn't need to. From a theoretical perspective QC improves our understanding of the physics of computation by bridging the gap between our classical theories of computation and our quantum theories of physics. QC gives us access to "quantum observers" to allow us to take our understanding of what Quantum Physics "means" further. QC lends some support to the many-worlds interpretation of Quantum Physics - Where else is the computation being done if we are retrieving answers from their interferences? From a physical perspective we are learning a lot tackling the hard challenges of realizing them. Even if we never build "practical" Quantum Computers, experimentally it would still be worth building them as physics experiments. And if we can build real practical machines they might have significant advantages in some practical fields like quantum physics simulations. * Unless somewhere the NSA (or their Chinese equivalent) are breaking cryptography using some moonshot machine.