Conductive performance of copper-graphene composite

Just stumbled upon this article on higher conductivity copper for energy transfer:
Not exactly the 99,9999% OOC that we as audiophiles recognize as ‘ideal’.
This novel composite might potentially also be beneficial for PC or even IC, so what would the result be if the (scientific) consideration was to find the optimum for signal transmission (whilst perhaps also considering e.g. silver as carrier metal)?