Yes I have thought about it, and I do think "thinking about it" brings me tons of cool ideas about what you can do with it.
But the problem is, there's a huge difference between a cool idea and actual execution, just like Apple's Newton flopped but decades later iPhone succeeded.
I use Ableton pro to make music, I use final cut to make video. I'm pretty sure I fall into the "creative class" of people you're referring to, but I never use any of the touchbar features that ship with the apps unless I'm forced to. It's much faster to use keyboard shortcuts, and I'm sure most "pro" users are already much better with the shortcuts that they don't need the touchbar features.
I'm not saying the idea is bad. It's just a horrible execution.
Since you say you're a creative professional, let me ask you, do you actually use any of these features and think these really improved your life significantly? I'm not talking about imagination, i'm talking about actual product. In my case it's much more of a trouble than any real benefit.