Yeah, I agree Brian, at least they come in a prismatic form factor, they will save a lot of space compared to A123's.
But, who knows, the energy density might be a little greater than A123, but because of the efficiency, they will appear more energy dense. Next spring, when I start my electric motor bike conversion (1:1 scale we're talking), I hope that these will be available for it. I was planning on using A123 cells, but these looks even better for it!
Also, they say they use stacked plate design, instead of rolled; they claim it's more efficient, more robust, etc.
I am looking forward to hearing what they say Hickoryhead. I was going to email them myself, but yours will do...