[danudey]

According to the paper, this material stops superconducting at about 150mA per cm^2 of diameter, meaning that a 1cm-thick cable made of this material could conduct up to 150mA before the current is too much and it stops superconducting.

If my math is correct, then for a basic 500mA USB device, that would mean a cable a bit over 3 cm^2 in cross-sectional area, or about 2 cm across (for each of the power and ground leads, at least).

Alternately, a cable of just over 1/2cm in diameter (for power and ground, each) could charge a rechargable Ni-MH AA battery in about 12 hours and 40 minutes.

Tl;DR this is absolutely revolutionary science, if true, but we're definitely Not There Yet.