Here's my update story: I was initially getting an instant update fail "Error 80070003". A quick Google search says to delete the files and folders under \Windows\SoftwareDistribution\DataStore and \Windows\SoftwareDistribution\Downloads. After clearing those out the updates came down fine. Most likely cause was me tethering to my phone this afternoon for a couple minutes. It probably checked in with the Microsoft mothership and started to cache the updates. When I disconnected from the tethering session the cached files sat there unfinished. Odd that when I connect at home the updates can't figure out that they're messed up and just re-download.
Anyway!!! The updates appeared to install fine and the first of a few reboots took place. (Surface logo and installing updates at the bottom of the screen) I got a couple reboots and then uh-oh, what was that big temperature icon??? The system turned off so I felt the back of my Surface Pro and sure enough it was running kinda hot (Fans never turned on). I let it sit for a couple minutes fearing the worst (EPIC BRICK FAIL!) Bravely I tapped the power button and it turned right back on with the same Surface and installing updates screen. This time I heard the fans kick on full speed and it seemed to reboot one more time. A sigh of relief as I get to the login screen without issue. Everything looks fine! I grab my stylus and no worky! I read someone's post about shutting it off and back on again so I do that. Stylus back and I see no yellow "bangs" in the device manager.
It will be interesting to see if my WiFi behaves better. I read that the firmware update provides "improvements to "limited" connectivity scenarios". Which I was definitely getting on my router.