An interesting idea!
I would have wanted something to tell me when I was at "shave ready" so bad when I first started honing.
I never did find anything though, except 2 things.
One was the TPT, which to me is the best method for assessing while honing. The thing, of course, was to calibrate it. Gain experience if you will:)
The second was the arm hair test. That too, took quite a while to get the right feel for, but now it is of value to me, and tells me what I want to know.
I'm looking forward to see if this concept gets to a usable level and how you find the consistency of it!
As the others have noted, I'm not sure this can be used to assess the smoothness, but we'll see when you get it done what you find
Good luck!