I think in a few years, we're going to be looking back at this as a half-assed hack before we were ready for a macbook with a full touch screen. Touch typists (which I'd imagine are an increasing proportion of computer users) don't look at the keyboard. Touch cues (ridges on the F and J keys, placement and size of keys) guide typing and control without the need to look.

Even if you just used the touchbar to allow for context-sensitive buttons, I'd lose the real tactical feedback of a keyboard and need to build new muscle memory for each application.

Worse is when you start putting GUIs on the touch bar—now I'm really expected to look down and scroll through a library of photos or find my favorite website on this tiny strip which isn't on my screen? Why?