An online user at Arstechnica has just opened a new polemic related to the new Apple portables. The Mac user wanted to view a film bought from iTunes Store on his video projector connected on new MacBook via mini Displayport adapter to VGA. He had a bad surprise with error message below.

iTunes refused to launch the film, since the projector did not support the HDCP standard. By extrapolation, this implies that it will not be possible to use an external Apple monitor (except certainly the 24" LED) and all VGA peripherals to see, at least some, films distributed by iTunes.
But these things need to clarified. We believe that it is essential that Apple adopts this standard. One day it will be needed to support the Blu-ray reader. However in this case, in our opinion, the problem is elsewhere, in fact on iTunes.
Apple has not informed anybody of this constraint on some of its videos or maybe made it in such a discrete manner that nobody realised it. We consider that the choice to set up a protection HDCP on films intended to be seen on Mac (contrary to the Apple TV) is to a certain extent dishonest. One cannot force the adoption of this protection and at the same time continue to sell incompatible equipment. Rather oddly, it seems that these videos are prohibited to be read on MacBook Alu, but remain compatible with other machines completely deprived of HDCP such as the Mac Pro.
One can possibly accept this policy change, doubtless dictated by the major distributors, but Apple must imperatively inform its customers clearly of the new rules and to indicate which hardware can be used to view the videos in future and especially to withdraw from sale or to modify all incompatible products.
Definitely, Apple lately is putting its fans through severe tests…
PS: There exists a solution to circumvent this problem. Attention, we are not certain if it is legal given that it circumvents the technical measures of the protection (but here the goal is to ensure a broader compatibility where there is any doubt). It is via the use of HD Fury (no link, use Google). This is an adapter which contains on one side a connector supporting the HDCP, and on the other a VGA or composite outlet. Attention, since the input is HDMI, it will not support the 30" monitors. Moreover it is pricey, nearly $250 (and with a VGA outlet) and is intended to retrofit very expensive projectors.