It wasn't a bad idea
But, as the author points out, the execution left a lot to be desired. I've often thought that if someone could combine those braille things where the different bumps can be done dynamically, and scale it up so you could create physical buttons on a touch screen in a dynamic way... then you'd be onto something. Like a plastic layer that sits over the display and you can puff up parts of it with air, or run a small current through it to make it take a specific shape. The tech may not be there yet, but if you could create physical buttons that pop into being as-needed, it'd be like the next best thing to a holographic interface that can be displayed mid-air. Which is the next best thing to focus follows mind.
Also... the butterfly keyboards... I remember starting a new job and being given one of those. The spacebar was broken, so I take it to the helpdesk and they just glance at it and then start into a rehearsed spiel about how the best they can do is try to blow some compressed air under the keycaps. I stopped them and pointed out this was something else entirely. The spacebar went down, it just didn't register when it did. Then suddenly they were interested in my situation again. Can't really blame them though, if I heard people coming in with the same complaint day in and day out like they did, I'd probably just mentally check out and repeat some rehearsed line too.