Not useful for quantum computing?
They're well on their way to doing just that. Don't have much time at the moment to look up some stuff on it, but please feel free to do it yourself.
I'll see what I can do in what little time I have left...
From IBM...
(much more at the link)
What is quantum computing?
Quantum computers are incredibly powerful machines that take a new approach to processing information.
Built on the principles of quantum mechanics, they exploit complex and fascinating laws of nature that are always there, but usually remain hidden from view.
By harnessing such natural behavior, quantum computing can run new types of algorithms to process information more holistically.
They may one day lead to revolutionary breakthroughs in materials and drug discovery, the optimization of complex manmade systems, and artificial intelligence.
We expect them to open doors that we once thought would remain locked indefinitely. Acquaint yourself with the strange and exciting world of quantum computing.
https://www.research.ibm.com/ibm-q/learn/what-is-quantum-computing/