I've nothing to add to all the commentary about GM. I'm looking at the bigger picture.
As I've mentioned before, this could be real trouble for multiple suppliers to GM, as the court could easily void existing contracts, negate payments and debts and create general havoc on an industry that is already in tremendous stress.
Longer term, I would expect a nice uptick in plastic usage in cars, given the Government's tremendous ownership share of the industry (Do you really believe that no government official is not going to use their influence?? They just can't help themselves, it's what they do, it's their inherent nature) as well as the higher mileage targets. Replacing steels and other metals will plastics/composites will reduce weight, although the real increases are in rolling resistance and drag, not weight.