Apple has touched on a few different outer materials for their Macbook Pros, Macbooks, Macbook Airs, etc over the years. We've had glossy white polycarbonate, matte black plastic, the current aluminum, etc. None of these materials have been without fault - cracking and discoloring polycarbonate, scratching and denting aluminum, etc. So, what is next for the various Macbook lines - specifically the Macbook Pro? What will lead to further durability and a more beautiful machine? I was expecting Apple to extend the glossy coating on it's 5th Generation iPod nanos to the Macbook Pros during the last refresh- but that was obviously not the case. My opinion is to somehow strengthen the aluminum- perhaps through an alloy - and apply a gloss scratch resistant coating. What do you think?