First steps of how LK99 could be used - embed superconducting nanocrystals into things. Given how insanely much metals we use for conductors I think it will be quite a while until this sees any kind of mass usage. But wow what an industrial investment boom we would be part of if LK99 actually works.

I also think it is very interesting that this entire class of superconductors will, as far as I can tell, be illegal in the EU for most application due to RoHS:

https://en.wikipedia.org/wiki/Restriction_of_Hazardous_Subst...