It's unfortunate this post was so soon in a thread with so many people that don't know a flip about HD...... You could have at least linked to some information so the unknowing could read up on it.
Currently, RBG analog (component) is amazing at pushing through a full signal. I have a 1080i HDTV and an HD DVR and an HD DVD player (attached to my 360) both the HD DVR and HD DVD player are connected to my receiver and then to my tv via component cables. There is no way that it's only 576p. The picture is so great on HD TV and HD DVD's - I can gaurantee it's 1080i that I am seeing.
The HDCP is not currently downgrading signals sent over an analog medium - it's more for future players and future TV's than anything else, along with the ICT flagging that is currently NOT happening - that is supposed to limit a signal and downgrade it to 960x540 when the source media is copyrighted and the player does not have an HDCP connection.
Basically, if you buy an HD DVD player, and an HDTV today, you can use component and NOT get downgraded, even on copyrighted HD DVD's.
http://www.emedialive.com/articles/readarticle.aspx?articleid=11637#viiia
That is a link to a site that gives dates for the enforcement of the downgrading of analog signals from an HD source. It says at the end of 2010 new playback devices will downgrade analog signals. As for now, you are more than welcome to come over to my house and watch Heroes on my HD DVR or King Kong on my HD DVD player and we can discuss whether it's 576p or not.....
If this is not correct information, please prove me wrong - and I will gladly switch over to HDMI - but I can not tell the difference in PQ (picture quality).
Here is a quote from that site I linked to regarding HDCP - 'As of today, most televisions, monitors and video cards do not support HDCP.' - It then lists government mandating that by July 1, 2007 - all new HD-ready TV's must include HDMI or DVI with HDCP. That was just a couple months ago. So you can't tell me that the government and DRM issues are going to screw the early adopters of a technology out of the full 1080i goodness... It's just not the way things work - instead, they move forward with implementations like this.