Here's the current running list of what the update contains for both PCs:
- Microsoft driver update for Surface NVM Express Controller.
- Microsoft driver update for Surface Management Engine.
- Microsoft driver update for Surface Embedded Controller Firmware.
- Intel Corporation driver update for Intel(R) Precise Touch Device.
Unfortunately, Microsoft hasn't yet posted a full list of changes online, but we'll keep an eye out for any additional changes worth noting.
Interestingly, however, clicking "More Info" on the update dialogue for the drivers takes you to a brand-new Driver Information site from Microsoft. While there's currently not much to look at, it looks as though Microsoft will soon start serving up more details on its driver updates here.
Special thank to Jesse Cook on Twitter for pointing out the Driver site!