You are misinformed about the HD-DVD format. It isn't DVD Video, it is MPEG-4 Windows Media 9 Format video in true high-definition 1440i that, Microsoft is hoping, will be an additional data track.
I'm confused 🙁, though I'm almost sure M$ is marketing their new mediaplayertrack as DVD-HD.. (Unless this magazine is wrong)
Outcast enhancements.. well, bonus material blizzard style.. not lot's of it. The intro is available as mpeg2 tp watch in your dvd-player, but the image quality is very bad, probably captured from the cd version (that bad, mpeg quality). I don't know if there is an intro on the cd version, if someone could confirm that ?
The neat thing is the soundtrack, which is done by the moscow symphony orchestra and chorus. To bad it's not the dolby digital one we hear during the game.. (That's just mp3.. bummer). The soundtrack is real nice (If u like orchestra's that is).
The DVD version of outcast isn't really a must have.