Originally posted by Barto
As someone who has taken apart iMacs, They could probably hold 30" LCDs no sweat. The base is far, far, FAR heavier than the display.
Wouldn't the problem be more the ability of the hinges on the arm to bear the weight without sagging, especially over the life-time of the machine?
If the weight of the base were a problem, which I'm sure it isn't, they could probably put some lovely cheap lead/depleted uranium/etc in it anyway...
edit: wow, that was a flurry of responses, and I lose