My new rMBP arrived tonight and I find myself a little confused. When I go into the display settings the display is set to "Best for Retina Display" but that certainly isn't 2880x1800 or at least I don't think it is. I say that based on going to interfacelift and finding a 2880x1800 wallpaper and it's scaled quite a bit. But when I change the display settings to letting me used scaled resolutions it seems the highest I can go is "looks like 1920x1200". What am I missing? Either way I am thrilled with my new machine, but I want to make sure I am getting as much desktop space as I can coming from a 27" iMac. Thanks in advance.