It means LK99 is about as good as the other materials, at minimum. However, its chemical composition is different than any of the other materials on the chart (i.e. it is lead based). That probably means there's lots to learn and new phenomena to be understood and optimized.
Furthermore, if this lab could achieve these results in a matter of weeks, perhaps labs with more exotic equipment and dedication will be able to get better results, raising the bar even higher.