I saw this one. It sounds a little like another I saw a while back which I think had something to do with Toshiba or Hitachi. It too involved increasing the volume of one or both of the electrodes using some kind of nanotech. I forget the sort of power output and longevity they were claiming, but I recall it charged to 95% of its capacity in a minute and 100% in only five.
That was over a year ago I think and it mentioned that they would start with car batteries (big ones for electric cars, not just for internal combustion ignition systems), then start to shrink the technology. It could be some time before we see these in devices on shelves. Even if the technology and the manufacturing yield scale quickly, there is doubtless all sorts of red tape associated with patents and licensing deals.
Look forward to them though. The future is getting here....... at last!