I'd be very surprised if the new crop of players would only play one version of HD-DVD. There'll be some, much like there are some that only play SACD or DVD-A, but I'm betting that this format war won't be quite so bad as Beta/VHS was, because this time we'll be able to buy a player that can handle either.

1920x1080 DVD's played back on a 1920x1080 set via HDMI? I'm so there!