From the MS Community web site:
•UEFI firmware update enables the PXE boot feature. This feature is only available when using the Surface Pro Ethernet Adapter due to the UEFI integration needed to implement PXE boot.
•Video driver that improves the Skype experience and resolves an OpenGL bug in Adobe Photoshop.
•Trackpad Settings Driver for Surface Type Cover to enable interaction with the Trackpad Settings Application for Japanese customers.
•Continued improvement in Wi-Fi connectivity and stability.
These haven't shown up for me yet
•UEFI firmware update enables the PXE boot feature. This feature is only available when using the Surface Pro Ethernet Adapter due to the UEFI integration needed to implement PXE boot.
•Video driver that improves the Skype experience and resolves an OpenGL bug in Adobe Photoshop.
•Trackpad Settings Driver for Surface Type Cover to enable interaction with the Trackpad Settings Application for Japanese customers.
•Continued improvement in Wi-Fi connectivity and stability.
These haven't shown up for me yet