Having a new input device is only useful if there's new software that takes advantage of it.
Nobody gives a crap about the MacBook's Magic Bar or whatever the heck Apple is calling it because nobody, not even Apple, bothered writing software that actually utilizes it.
And of course, this is a chicken and egg problem.
Nobody writes software for hardware that nobody has. Nobody wants to spend an extra $200 to get the touch bar, because there's no software for it. Nobody writes software for it, because nobody has one.
Apple brought this on themselves from both ends: They didn't write killer software for it on the software side, and they didn't make it standard from the hardware side.