I'm generally as optimistic about the future as the next guy, but it seems very early to be talking about how to apply this effect. A new state of matter would be a fundamental change in what we understand about 'stuff' in general. If they can actually observe this new state and begin to understand it then maybe we can start talking about what it would be good for.
Quite interesting indeed since having superconductivity at a room temperature would make a shift in energy storage and transportation without loss... or at least minimal loss.
Superconductors offer no resistance to the current that goes through and lets not forget about the Meissner effect which allows the rejection of magnetic fields whatever the polarity. The levitating trains would become very common.