That will just be part of the fun... First adapters = guinea pigs but we never learn! I've done it with original iPad, iPad 2, iPhones 4 and 4s, now new iPad.
Every device that has a light source is nearly impossible to prevent leaking from. However, the two 'new' iPads I had in my hands today were a damn lot better than the ipad2's i've had in my hands regarding leaking light.
Are you just saying this because now that we know that Samsung makes the retina displays you think they are going to sabotage Apple by providing defective screens?
Whether or not there is light leak there will definitely be a few dozen threads with blurry pictures of iPads in the dark asking "Does my The New iPad have backlight bleeding!?!?"