Interesting approach. If it actually has a button underneath the touch screen or works like a trackpad on an Apple Macbook I'd be intrigued, but only under one condition: It has to work with gloves on (don't care if the gloves are specially made...). So far, I haven't found any gloves that work properly and in a reliable way on touch screens, at least not on my R or my apple products. If anybody has a suggestion, I'd appreciate it.
Will it make to production on a DSLM or DSLR? No chance, Canon literally had a shit-storm coming their way for the Touch Bar button on the R. Looking at the RP, R5/ R6 they learned from this disaster. I'd only give a chance on a Powershot model or something similar.