god no you dont need a camera. each pixel on the screen has a tiny camera no bigger than the actual pixel and take a 1x1 pixel picture. it does have a very fast refresh rate, about 300fps to mimic that of a circling vulture. i cant remember what this technology was called but it was along the lines of 'meme'.
of course it was engineered in Germany.
iBook screens are compatable but not Powerbook. rumour has it that Apple are waiting for 600fps capture rates before putting them in the PB range, and the iMac too. however Apple have deactivated this technology for now. it will be made available via Software Update once Duke Nukem Forever is out.