Imac 27 has a gorgeous display ,i don't need a Retina display to be sincere,
now i hope Apple have all to build and release it,Gpu(7970m,680m)are out(680 not so sure),Cpu is out,Usb3 and Cactus Ridge Thunderbolt are available too and already built in new MacBook Air,Pro..,so the last piece missing is just Mountain Lion.
Next year,maybe,with a redesign,Haswell and a new Gpu (??) we will see the retina land on Imac and on Cinema display,right in time to link with the new Mac Pro.
I really hope to see Imacs released in July ,in Fall the stage will be for Ios6 and Iphone 5,while on other side Windows 8 will start to sell,so i see the ML release the right time to introduce the new machines (maybe with the new mac mini{will it share the same Air specs?} too).
Let's see.
ps.
As someone pointed out here ML wallpapers are 3200x2000,i think this is a very good point,even if i don't want retina gpu hog to happen.