One of the problems of using super capacitors for energy storage is that they have much higher self discharge rates than batteries. I can see applications using super capacitors and batteries together in order to take advantage of the best features of each.
Makes sense.
The graphene capacitor linked to standard type batteries which constantly draw a current.
But like the Freepers state, problems in cold/hot temps, driving around in your electric car with a cap/bomb under your butt.
I wouldn`t want to be the first to own one. Look at the suckers who bought a Fisker :-)