I wish them well, but this has all the signs of nanotech vaporware. The article even mentions graphene, and empirically, that seems to be a death kiss for every promising technology announced in the past three decades.

The tech to make your own PCBs at home already exists, it just doesn't really make sense to spend weeks making inferior boards when you can order custom boards for pennies and have them at your doorstep in a bit over a week.