With zero fanfare, the 30-inch Cinema display went from these specs:
Brightness (typical) 270 cd/m2
Contrast ratio (typical) 400:1
Brightness (typical) 400 cd/m2
Contrast ratio (typical) 700:1
I guess that Apple just wants us to absorb this information telepathically, which by the way is how I got this info.
(OK, I lied. I telepathically read it on Engadget.)