I think its safe to say that its still very much in the air if the xbox 360 will have dvi or hdmi. After meeting with Microsoft and seeing it at E3, IGN.com believes it will have dvi or hdmi, but I am sure there are others that believe it won't. IMO it would be a huge mistake to not include at least DVI, but that is only my belief.

http://xbox360.ign.com/articles/608/608394p4.html
Quote:
being that Microsoft is being very, very aggressive with image quality at the moment, we expect some sort of DVI and/or HDMI connection to be available.