I think we need more forged composites, which are processed kinda like a hybrid between injection molding and forging.
http://www.carbonfibergear.com/what-...-carbon-fiber/
That would help reduce weight and it would be cheaper (in the long run) than doing the commonly seen laid-up sheets. It's also not as strong as the woven sheets, but it's not got the same directional weakness.
When we see stuff like this being used more often, we'll see radical drops in the weight, and in turn the requirements in power and displacement would also drop.