The following is the description of the High Definition Pak:
The High Definition AV Pack connects the Xbox video game system to high definition-ready televisions. Supports 480p, 720p and 1080i component video signals for game play (NTSC only for DVD playback), analog audio inputs and digital receivers.
I am curious about the "NTSC only for DVD playback". Does that mean the xbox will not play dvd movies in progressive HDTV format?