We originally developed NERDs inside of my last startup for monitoring the progress of solar developments. There are many different multi-modal event feeds that you need to monitor for a wholistic view of the project. NERDs helped glue together the event around entities.

Only later did we adapted to the technique to work to long books. The existing long book benchmarks seemed like the most appropriate way to show the core idea to a wider audience.

So ya, I'm confident that this central idea can be applied in many different domains.