Yep, as the title states, if you dont have either an HDMI or DVI input on the back of your fancy new HDTV, you wont be watching HD DVDs, or you will be watching them with a severely downgraded picture quality. And even if you do have a HDMI or DVI port on your TV (Mine has 1 single DVI), you probably allready have something connected to it, causing even more problems. Not a happy story.
http://gear.ign.com/articles/691/691408p1.html