A company that claimed to have built a general-purpose quantum computer, which would speed up a lot of computationally-intensive tasks, may have actually built a weaker device that does something called quantum annealing, which allows it to solve only a subset of problems - those that involve finding the lowest value state in a field of lots of values.

Furthermore, it doesn't look like the device solves those problems any faster than well-optimized code running on normal computers. Which cost about 10k times less.