The cost of CF will drop because it will be massively produced. It is now being used in racing car manufacturing in USA by Panoz for their 2012 ALMS program.
There is a new material called REAMS (Recyclable, Energy Absorbing, Matrix, System), which is lighter, cheaper & easier to produce. I wonder if ppl at BMW had actually considered it. Well, we'll probably never know. But here is a link http://www.highcroftracing.com/news/...-panoz-qa.html