^^^^ I won't confirm nor deny that I'm at AA (

), but regardless I'm not on the 737, so I have no clue what happened.
There's nothing magical about the iPad installation - most pilots have a Wifi only 16GB iPad Air 2 (a few early adopters still have earlier versions of the hardware) running JeppFD-Pro for charts, and eLibrarian Pro for manuals. We also have a WSI Pilotbrief app for weather. Everything is stored locally - charts, manuals, apps - all of it. The FAA doesn't yet allow us to turn on wireless once in the air, nor can we use the internal GPS to show our position on any of the maps. That's not to say that it doesn't happen, but it's not approved. So they're completely self contained.
Apps crash and need to be rebooted from time to time. Sometimes an entire iPad will shut down if it overheats from being in direct sunlight for too long. But what happened here is unusual. The paper has been removed from the flight deck, so if both iPads take a crap on the taxi out, there's really no choice but to head back to the gate. There are supposedly stashes of replacement iPads at all the bases, but I've never had to go down that path before.