The site has been updated with the info. See here:
Microsoft Surface Pro 3 update history | Surface firmware updates
But according to some posts on Reddit, this update is causing problems. Personally, I have not experienced any and the crashing display driver problem has also stopped. I think - not sure yet - that my SP3 is also running a bit cooler than before. Not tested battery life yet.
Aside: A similar firmware update is available for the S3. I updated that too. Again, no problems though some on Reddit are saying that they are also facing issues. One thing though, I can't seem to get the Surface App to work. It is not recognizing the new Pen that I paired with it. I have tried reinstalling the app, pairing and unpairing and repairing the Pen with no luck. So, I can't yet map the buttons on the Pen to my chosen app(s). But I believe with this update we are supposed to be able to do that. This applies to both the SP3 and the S3 to the best of my knowledge.