This allows a Surface device firmware to be automatically updated along with all drivers through Windows Update.
Provisioning packages New in Windows 10, provisioning packages (PPKG files) provide a simple method to apply a configuration to a destination device.
For a list of the available downloads for Surface devices and links to download the drivers and firmware for your device, see Download the latest firmware and drivers for Surface devices.
On Surface devices, the firmware is exposed to the operating system as a driver and is visible in Device Manager.
This method allows for a similar deployment experience to the Windows Installer package and can similarly be deployed as a package by using System Center Configuration Manager.
You can find the Power Shell script and details on how to perform the firmware deployment in the Deploying Drivers and Firmware to Surface Pro blog post.