Extremely important! This is surely one of the most important discoveries in physics in the past several decades. It is not even so much the confirmation of the gravitational waves themselves, we were very confident that they existed, it is that we now have the ability to observe the universe using this entirely new spectrum.
When researchers need to compare complex new genomes; or map new regions of the Arctic in high-resolution detail; or detect signs of dark matter; or make sense of massive amounts of fMRI data, they turn to the high-performance computing and data analysis systems supported by the National Science Foundation (NSF).
Einstein believed in something like Spinoza's "God": a powerful entity that transcends the world. To Einstein, "God" was the maker of the laws of physics that he, Einstein, saw as his life's role to uncover. This is far from the "God" of organized Western religions, to be sure, but it is equally far from Lawrence Krauss "universe from nothing."