I doubt there will ever be a market for a device with this specific (or many other kinds of other specific) set of requirements, especially if one insists on that 'last bit of polish'. Short of fully developed molecular nanotechnology or similar, allowing economic manufacturing of bespoke hardware in single copies, which is another world from the one we live in, I don't see such wishes come true, so the author (and others like him) will have to settle for something else.