I did this in 1984/5! I used discrete components embedded in epoxy and thin ptfe wire that was woven into knitted garments. It was fun (and for its time, quite unusual) Fully washable/dry cleanable. Guaranteed to attract attention at the disco.
Modern "wearable tech" seems to be pretty boring, most of what I have seen seems to be the lazy flashing led option at art/fashion college or variants on the theme of pedometers/respiration/cardiac measurement.
I don't count elaborate pouches for holding smart phones and the like, this is not tech :)
There was a member when we were at Cremer Street who was developing an imaging device for blind people that was very interesting. It involved a waistcoat that had a grid of stimulators that was coupled to a camera. The waistcoat would "print" an image onto the wearers back. I would be interested to see if it was turned into a useable thing.
Phil
Ioannes 8:32