Earlier quoted context omitted.
They have to recover the money spent on TouchBar R&D. We won’t see a proper MacBook Pro until 2020.
It seems to me the touchbar was just a clever way to get their own processor into their laptops for some large scale real-world testing before they ditch intel and build the entire thing themselves. 2020 is a good guess I'd say.
P.S.: I don't even think touch-only input is neccessarily a bad idea. All Apple has to do to make it work is to implement some kind of really good haptic feedback which also allows to feel individual keys. I even expected that for this iteration of the MBP for the Touchbar.