It looks like Microsoft has packaged all of the firmware and driver updates for Surface Pro’s that have been released through June 2013 in a single download option.
Cumulative firmware and drivers for the Surface Pro. This firmware and driver package contains drivers for all of the components in the Surface Pro device, as well as updates to the system firmware that have been released via Windows Update. These drivers and firmware are compatible with Windows 8 Pro and Windows 8 Enterprise. These drivers and firmware are not compatible with Surface RT.
Use these drivers and firmware to prepare your custom images for enterprise deployment, or to repair problems with custom installations of Windows 8 Pro on your Surface Pro device.
As you can see this download package is targeted towards the Enterprise folks who need to possibly prepare images of a Surface Pro setup for their users.
In fact, the download not only includes the firmware and driver updates but also an Enterprise Deployment Quick Start Guide for Surface Pro.
I am sure any Surface Pro owner could also use this download to update their system directly instead of installing these fixes via Windows Update.
You can grab the Surface Pro Firmware and Driver Pack from the Microsoft Download Center.