Came across this article, does anyone know if this is still the case?
Starting April 1, 2004, cable operators will need to provide HDTV set-tops with "Firewire" (IEEE 1394) connections to subscribers who request them. By July 1, 2005, HDTV set-tops will also require a digital visual interface (DVI) or high-definition multimedia interface (HDMI).
http://www.wirelessweek.com/article/CA373577?ticker=CMCSK&type=stockwatch