I've gone from the early 2011 17" MBP (Glossy) to the new Retina MBP and have noticed a welcomed improvement the way the lid works. There is now rubber that runs all along the bezel to make a nice clean seam with the aluminum when the lid is closed. The benefit I've noticed is the screen no longer touches the keyboard keys. There may be several reasons why Apple designed it this way, but it used to bother me that dirt/grease on the keys would easily get on the screen in the previous model. I have not noticed this happening yet on the new one and I've had it for a week now.