What problem does the Touch Bar solve, the author asks? I'm glad you asked! As just a singular example of why I'd almost buy a new MBP just for this feature, I switch between Xcode and Android Studio multiple times per day. Now, is it F6 to step over? Or is that Xcode, and F8 is what I really want? Add to that the many years of burning Visual Studio shortcuts into my muscles and I can't keep track of which button to press just to step into a method. I ass-u-me this can be solved by instead putting "Step Over" in place of what used to be the F8 key. Now what I'd really like are OLED keycaps so that "F8" gets replaced with "Step Over" on a physical key. But I'll take the Touch Bar; close enough.
Other examples abound, but I'll leave it at that. The whole post struck me as "Apple made an announcement. Quick, write a contrarian post!"