The last sentence of the paper seems to imply that this result will give people a reason to want to develop those:

The development of dedicated VUV lasers with narrow linewidth will make it possible to access a new regime of resolution and accuracy in laser M¨ossbauer spectroscopy and to perform coherent control of a nuclear excitation"

Previously, if you wanted to manipulate nuclear states, you needed a synchrotron. Now, you need an infinitely less expensive instrument. I suppose the idea is that that will generate a lot of interest in improving the less-expensive instrument.