I have a brand new 13" Macbook Pro that is just a few weeks old. I have kept it in prisctine shape since it arrived. I'm having the same exact problem, and it didn't even happen because of the update! I just opened my computer last night and the touch bar was completely black.
I tried finding touchpad on “Activity Monitor” to quit and relaunch but it doesn’t even exist there.
I tried to reset NVRAM with the command+option+p+r
I tried to reset SMC
None of these options work. There is no way I am spending $475 on fixing a brand new computer I just spent a lot of money on. This is my third Macbook Pro since 2007 and I love this product. I moved overseas for work right after purchasing the new computer and now need a replacement. I fully expect Apple, a global company to help me out.