It would be huge, definitely. Even the most obvious application (reducing electric power transmission losses) would be worth billions. According to the Googles, ~4000 TWh generated annually, 6% transmission losses, $.09/kWh gives about $22 billion in annual savings in the United States alone (if I didn't mess up the arithmetic).
That's why the US navy is heavily into this - for submarines and ships.
It'd also make very large offshore wind power plants potentially cheaper.
Electric / hybrid propulsion in aircraft is another. When your thruster is just a light fan, you can place it in the best aerodynamic / least noise generating position, then put the power generator and batteries where there's space and it makes sense for center of gravity. You could have rejuvenation of near city airfields again.
extreme sensitivity applications: portable NMR spectrometers/MRI scanners, practical quantum computing, very fast and sensitive microwave processing, easy access to large scale fermion condensates for scientific research