Or take the Touch Bar button for inserting an image. I’d say that over time it could prove to be considerably more than that, not unlike 3D Touch on iOS.) (“Fun” plays into the narrative that the Touch Bar is just a novelty. Of course, you could just go the old way and hit ⌘-O or click File and hover over Open Recent and select a file, but tapping twice might be faster - or at least more fun. Tap it, and poof, you see a long scrollable list. It’s the clock icon near the right of the App Controls for Word (that is, to the left of the display, sound, and Siri buttons in the control strip on the right end of the Touch Bar.
One thing I already know I’m going to use a lot is the Touch Bar button for opening a recent Word document.
That’s just one of many things you can do, though.