HD DVD and Blu-ray both are 720p/1080i, I don't think they'll provide 1080p, but I could be wrong.

Quote:
...HD DVD's that will reduce the quality without a specific cable.


That's a requirement of the Advanced Access Content System (AACS) and is implemented via a flag called the Image Constraint Token (ICT) on the disc itself. The content provider, and not the device (DVD player), controls this flag, so it's possible to have discs that do not down-convert. If it is enabled, I believe it restricts output to 960x540. Also, AFAIK, all discs that have the ICT flag enabled must state so on their packaging.

I've heard rumors that a few of the studios are already saying they won't be using this flag, at least for the initial releases. I guess we'll just have to wait and see.
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