When it comes to OS updates for the BlackBerry Passport, Rogers seems to be leading the pack. They were the first carrier to roll out an update before the device was fully officially announced and now they've gone ahead and released another. Now appearing on Passports is software update v10.3.0.908 otherwise known as OS v10.3.0.1418.
The update doesn't really specify what has changed, but folks in the CrackBerry Forums are already digging through it. Of course, you don't really need to be on Rogers to receive the update either. The files are available for loading yourself if you wish and if you hold out a bit later, I'm sure some autoloaders will be created.