Apple Displays are the hardest updates to predict, mainly because they just don't update them. There is no evidence to suggest a replacement now, except that they need one. If you do buy one and a new one comes out shortly after, it will just be a matter of bad luck as rumors of a replacement have been out forever. It has been 938 updates since the last update, easily the greatest of any product, but the Buyer's Guide hasn't updated itself in a while.