So there have been unboxings of the new Xbox 360 superslim and apparently it's missing some pretty basic AV outputs. It's either shitty old composite or full HDMI, with no support of component cables or optical audio. It's a weird decision. I know they want to push HDMI for the Xbox One, but composite cables are still pretty high quality and there are a lot of people out there using them.
And then there's the optical audio issue. Personally, when I bought my receiver support of the audio part of HDMI was still fairly rare. I don't know if this has changed now (I'm not really in the market for a receiver), but the way it works is that it supports HDMI video, but basically just as a pass-through. It doesn't have the DSPs to split the audio and video signals, so for audio support you have to plug in a separate optical audio cable. This is something I considered a minor inconvenience at most. Every device I've ever worked with that does HDMI has the ability to output HDMI video with optical audio. The quality of optical audio is just as good, so all it really meant is that you needed another cable.
But if somebody with a receiver like mine (which I was under the impression was quite common when I got my receiver, maybe that's changed...) wanted to get a 360 superslim their choices are either no audio (well, they could go straight to the TV speakers I guess, but it wouldn't use your home theater system...) or shitty composite video with only two channel audio. That's ridiculous. I guess your third option is to buy a new receiver that supports HDMI audio, but good receivers are expensive.
The 360 superslim is literally the first device I have ever heard of that can do HDMI video but not optical audio. I have to wonder if that's a sign of things to come. Is the Xbox One going to be like that too? I suspect so, and likely because of the way they're pushing the TV input stuff. They want everyone to use all-HDMI because it simplifies the inputs. The problem is, not everyone is using all-HDMI and rather than trying to adapt to the needs of consumers MS seems to expect consumers to bend over backwards for them.