All of those examples show large, high DPI (really thin fonts) colour touch screens, in non standard sizes. These are completely impractical from a cost perspe

All of those examples show large, high DPI (really thin fonts) colour touch screens, in non standard sizes. These are completely impractical from a cost perspective, requiring expensive tooling (>$100K) and easily $50 per screen (e.g. iPhone screen https://technology.ihs.com/595738/ https://technology.ihs.com/595738/), plus the massive firmware development cost increase from a small 8 bit micro to some giant ARM core, probably with a GPU as well. You wouldn't design a phone app using the non standard widget toolkit unless you had a good reason, why do designers dabbling in appliance design not use the standard toolkit of physical switches and knobs to start with and see what they can come up with?