Smart clothing isn’t quite ready yet. Back in 2014, Gartner predicted that the shipment of smart garments in 2016 would hit 26 million, overtaking fitness trackers by 7 million units in the process.

Smart clothing is the wearable we expected to go mainstream many years ago, but things haven’t quite panned out like that. We hoped Google’s Project Jacquard would be the turning point but many of the ...