[skowmunk]

if the same miniaturization technologies as Ipad were used, wouldn't the 15" have a lesser weight/unit screen area, when the computing electronics/battery components are removed?

Or for that matter another pure screen gadget the same size as Ipad, it would be lot lighter than the ipad itself. wouldn't it be?

[limmeau]

Judging by the pictures on iFixit[1], the PCB and the battery don't look very heavy.

1. http://www.ifixit.com/Teardown/iPad-Wi-Fi-Teardown/2183/2