Despite all the fanfare around what blockchain technology COULD do to help government better serve citizens, we are still very early in actually SEEING it work. 

We're still talking about the technology, when we should be talking about, and putting into at least prototype tests, actual use cases. One of the reasons, I think, the uptake has been more cautious is because of understandable concerns around whether the tech is overkill for certain use cases (it is), and whether it's really as secure as advertised. This article gives a good overview of where that conversation is right now among government leaders who are trying to figure out the how to improve services to citizens.