24 October 2019
“Quantum advantage means demonstrating computational supremacy for a meaningful problem, showing that a quantum processor has been built which is more useful than a conventional computer for at least one problem,” said Fitzsimons. “The path to large-scale quantum computing is more of a marathon than a sprint. The current result certainly places Google at the front of the pack, but there is still a long way to the finish line.”
https://edition.cnn.com/2019/10/24/tech/china-quantum-computing-intl-hnk/