You nailed it! Those missing events will slot into place as offline devices come online.

It works for any model where the use case doesn't really matter about up-to-the-minute accuracy, but for case generation and collation over time, it really excels.

We found the ES events wayyy to chatty to push back out to mobile (in 2012) so we push the aggregates back out to the mobiles.

Plus, if you're capturing GPS coordinates, running it through Kibana for real time map reporting is really exciting to watch!