Yes, but the question is why is Vista being blamed for this? This is the MPAA, movie studios, etc that have mandated it be this way. Either vista complies, or MS can't play the content at all...understand? It's going to be the same thing on your digital cable boxes soon, hell on some it already is, if you want the highest possible quality then the device you are outputting to MUST be HDCP capable. This is to ensure your not just dumping the output to a digital recorder....its all pointless but bottom line is its the way things are going to be because thats what the movie studios want it to be.
the movie studios and production companies and their BS copyrights have FORCED cable companies to impose more restrictive hardware and spend millions of thier own money to further "secure" their digital content so that its not easily copied.