Given the fact that so many love to take their knives apart to clean and maintain them, I doubt that will make an appearance on folders.
As for fixed blade construction, what would be the point? We already have corby bolts that can be used to speed assembly and help tame warped scales during construction. They are easily sanded off to have the appearance of a rivet or pin (as that would appear in a fixed blade handle) while providing the ease of use with a screwdriver slot as needed. Unless it is a utility type knife, it is pretty rare that a fixed blade needs to have its scales replaced, and on the current offerings of military style knives that have changeable/replaceable scales, those screws could cost more than the knife.
I am wrong about a lot things, but don't see the utility or cost to value merit of that since the author of the video readily admits it is very expensive. So with no practical use and a high cost, the need of a special tool to use the part, doubtful we will be seeing it in the knife world.
As for furniture, etc., I have put together Danish style furniture in the past that uses that type of bolt, but with no slots, keys. The bolt head looked the same, but it came with a wrench that had a half moon shape that was half the size of the bolt head. At the end of the open head there was a hardened pin, and you put the pin in the bolt into a receiver hole that was drilled into the outer rim of the bolt. Orienting the hole down, you saw the same appearance as the bolt above. That appearance has been around for decades and was pretty common on Euro furniture at one time.
I think it is a solution looking for a problem, but pretty cool to be able to machine to those tolerances, though.