http://digg.com/apple/New_Mac_Pro_Cinema_Display_lineup_coming_soon
"A new lineup of Mac Pros and Apple Cinema Displays are arriving in Q1 2008 and will be announced in Macworld 2008. As far as we know, the Mac Pros will be housed in the same aluminum casing, but the baseline processor speeds, RAM and hard drives are to be improved. Also, all models will be 8 (2×4) core Xeons..."
logic is that one machine does it all (Mac OS and M$ OS). Yes, this does not account for DVR or gaming boxes...