Thanks for that clarification, and sorry for not being clearer. What I meant was I'd love it of there was a version of an ID-like device that rendered video as well as audio (perhaps via an HDMI port that handled audio and video in addition to the RCA audio outputs). If forced to forego the RCA audio outputs to gain HDMI, that would be an OK tradeoff, although I'd prefer to have both so I can send the RCA audio to the home theater receiver I have in several rooms and the HDMI to the TV in each of those rooms. With a few home theater receiver upgrades I could just use an HDMI output from the ID-like renderer to the receiver and send an HDMI output from the home theater receiver to the TV in each room.
There are plenty of media boxes that will do what I want with respect to connectivity to my PC, receivers and TVs, but I think I'd have to dump MC to use a media box like a Roku or Apple TV. I'm not sure of that conclusion, because DLNA is a bit confusing to me - are there any existing media streamers that have DLNA audio and video rendering capability that MC can control?