Yeah, I think it is really nice we can build a custom iPhone app which does not use WIFI or a direct network connection to the Internet to get server / network management data on the other side of the world.
Of course, the sky is the limit, and some people might like home or factory automation and other person might want to control a server, like force a reboot (of course the app would need some built in access controls), etc.
Here in Thailand, we can drive around in the country side in our car, without direct Internet access, and can push a button on our iPhone to get remote server stats via BLE.
.... and I built the prototype in a very short period of time.
I'm not trying to advocate BLE or NB-IoT (or even the Arduino, per se; instead this test just demonstrates one possibility of nearly infinite possibilities for creative makers.
For this app, I think I'll create a few more "mini-apps" via the push button command console (and then post the sketch) and move on to testing another Arduino / shield module.