I don't do video editing or anything like that. My experience with a slider is pretty much limited to Netflix and such on my tablet :) Seems to work pretty well there. I can see how it might not work as well for fine-grained work. But that's an argument for touch screens in general, isn't it? Or do you think there's a distinction between Touch Bar and touch screen?
Caveat: On some video sliders, you can move vertically as well to increase/dilate the resolution of the horizontal movement. You won't have the same room with the touch screen. A couple options I can think of: use the track pad or a key press to modify the Touch Bar tracking; or perhaps track the speed of movement on the Touch Bar to modify the resolution, e.g., slower movement, higher resolution.
IMHO, as far as I understand it, Touch Bar is a bridge that connects the static nature of the keyboard with the dynamic nature of the screen. It is not intended to replace keyboard nor the screen. It is there to augment and extend them.
Touch bar is perfect for this job, considering:
- You can't beat the fast input from fixed keyboard + muscle memory.
- Touch screen on a laptop is really not ergonomic, your arm will get tired fast.