I was under the impression that they simply remastered in 1080p, which is nothing new. Many current DVD releases were mastered that way and then the DVD was mastered from that. The new Platinum "Se7en" was done that way from the original negative, etc... This is just more marketing hype. Good news is that they're ready to make many DVDs into HD DVDs due to the increasing use of this practice, Widescreen Review's interview with a WB exec says they've been mastering in 1080p for a long time.
I had not heard about the WM9 file. I have a post somewhere in here where I cut and pasted an email from a high-level MS employee on the WindowsMedia team who has been in Sound and Vision Mag who talks about the computational horsepower necessary for just 1080i, let alone 1080p. You'd need at least top of the line P4 just to get something other than a slideshow. I'd be willing to bet this is just rumor, but it would be nice if true.
UUronl, check out this thread, where the horsepower required for HD WM9 is discussed. It's actually not so bad, you definately don't need a top of the line CPU. In fact it works fine on very inexpensive AMD CPU's.
This is the thread where I posted the email from Amir from Microsoft. Read what he has to say. Artisan Entertainment is recommending a 1.8Ghz P4 for DVD playback which makes me wonder how good this WM9 file is going to be. Microsoft wrote the codecs, they know how much horsepower it will take.
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