Finally

Just a quote from the liveblog over at wwdc

It also has a 15.4-inch Retina display that boasts a resolution of 2880 x 1800 and 220 ppi. Not surprisingly, Apple was quick to point out this makes it the “world’s highest resolution notebook display.”

Well, there we have it, it’s just a question of time we hope before others take the challenge and create what we’ve been waiting for for so long.