Ther are plenty of well documented uses for quantum computers, the hardware is just too nascent to fully accommodate them. The most powerful quantum computers today still only have just over 1,000 qbits.
If you have significantly better quantum computers, you can solve realistic problems, yes.
But what's not being spelled out here is that as far as we know classical computers will still totally smoke them unless you allow a large probability of inaccurate results.
And if you are fine with inaccurate results, classical randomized algorithms make it a much more difficult deadline to beat.
Keep in mind that qubit requirements keep tumbling down as people work hard to squeeze out as much as possible from a limited number of qubits.