I currently have a 2012 MacBook Air 13 and I am thinking of upgrading to the MacBook Pro Retina 15 for the screen real estate and I am wondering if the Pro has the same propensity for scratches on the closed screen, ie: keyboard imprints or scratching from the track pad edges as the Air? I understand that the Air has a plastic screen while the Pro uses glass. I have seen a couple of comments that the Pro glass still gets scratched... I use a Shaggy Mac microfiber cloth on my Air for this reason. Feedback would be great! Thanks.