Its also a question of scale. Like solar, wind, etc… they would find that you very quickly reach diminishing returns. They mentioned “low voltage.” Perhaps they can generate enough energy to keep a very sophisticated computer chip “on” at some greatly reduced state.
But what about moving a 3000 lb car down the road at 60 mph?
Not to sound like a jerk—-but there are a LOT more low energy chips using electricity than there are 3000 pound cars.
Baby steps first.
Graphene is one of the most expensive materials on the planet. Takes a lot of energy to make it.
But what about moving a 3000 lb car down the road at 60 mph,** in the dead of winter with heater going full blast up a 8% mountain grade?
Unless I learn something else, the best I can see from this might be Internet-of-Things uses.
Powering cheap miniature sensors in a network seems plausible. I am hard put though to imagine other applications.