Makey Makey has been around forever: https://makeymakey.com/

Background: https://www.bbc.com/news/technology-18303012

It seems interesting, but at the same time the demos all seem to feature presses/simple gestures like stroking an object. The article’s title however, at least in my opinion, implies something along the lines as we see in capacitive displays, mainly a touchpad.

Interesting tech nonetheless! Especially the plant example seems interesting, as it implies that interactions can also occur on less conventional surfaces.