[Serious] Quantum v. Classical computing.

[Jehanne]

Question is, "Will a quantum computer beat a classical computer on anything?"

Photonic Quantum computing already can beat a classical computer at few very specific tasks.
However if a quantum computer will do anything particularly useful a lot faster than a classical computer that question is still open.

Can you provide a reference for photonic quantum computers outperforming a classical one? I can't find anything on this.