Unless there's a break-through nobody has heard of yet.
I would expect, that this will come from someone like Tesla .... a huge new investment in new battery manufacturing facility in North America. I believe the estimate is 5Bil. and they already have secured financing for that. That is enough dough to make something happen. Plus they are pushing the design quite a bid, seeing the way the battery sits in the Tesla vehicles. It's basically thin sheet layers at the bottom of the car (
http://www.google.ca/url?sa=i&rct=j...7ezLOUvlLoJNsA8LEzYl-UPA&ust=1397349327852443), opposed to every bike application effort so far I have seen where everyone is putting together the conventional cells ....