Even some HDMI sets don't have the HDCP-compliance necessary to play back HD content. That's another component of this new HD-clusterfuck that needs to be mentioned. HDCP (High-bandwidth Digital Copy Protection) is a system of using authorization keys located inside the monitor itself to determine whether you get to view content at full resolution or a lower resolution. I suppose it might be possible to add an HDCP module to a digital HD monitor, but I'm not sure. And I'm pretty sure it wouldn't be possible for older HD monitors that don't have digital inputs to do anything.
I've said in the past that most copy protection schemes simply promote piracy. As long as that continues to be the case, I won't exactly feel bad about pirating movies and music, and whenever I hear the industry complain of failing sales, a smile will come to my face. But if I were an HD early adopter, I would be VERY ANGRY.
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