Perhaps the OP read Alan's statement as saying "unless you have a 1080p display you might as well not get an HD-DVD or BluRay player" which of course is not the case.
That reminds me -- are HD/BR 1080i native, or 1080p ? I seem to remember that the info is stored as interlaced fields on disk.
Hmm. Further research indicates that this is not clear to many people
The most common view is that both HD-DVD and BR store full frames at 24 fps, although there is a recurring mention of HD-DVD storing video using "60i timing for 24p frames" whatever the heck that means -- AFAIK there is no actual timing info on the disk, just a series of compressed fields/frames plus flags indicating how they should be displayed.