It's like that tired old real estate saw, except it's "video, video, video".
However, and I think this came up last time a similar topic was explored (regarding the TdF), it's probably technically impossible to guarantee 100% of the time, due to the vagaries of satellite link-ups, etc. But I will say the problems I've seen in the past (ToC past couple of years) are more likely due to web server inadequacies, not satellite problems. I think these guys simply underestimate the massive amount of traffic and bandwidth required to pull it off, and they get killed.
Beyond video I'm not too picky. I guess some audio would be nice, unless it's some lame-ass announcer just babbling on and on to fill air time. It would be neat to see some kind of TdF-like graphic depicting the race (breakaways, leader position, etc.). The "zoom feature" could be done with links to Google Maps/Google Earth URLs? That would be a nice touch.