Its a material that basically gives electrons "inertia" which acts like an inductance derived from magnetic fields. There is a time constant to it, which determines at what frequency range it starts contributing to the inductance value.

To make it useful for power electronics they would have to push out this time constant by at least 4 orders of magnitude, I don't believe the theoretical material properties support that.

You might see this shaving off a few mm^2 from RF ICs and providing better RF performance. Applications in power electronics, where inductors take up the most volume, seems unlikely.