HD-DVD MACHINES: A Audio Question

Toshiba has announced one of these machines for sale of which a few dealers are taking advanced orders. There are some new audio features that these machines can decode other than DTS and Dolby Digital. They are DTS-HD audio and Dolby Digital Plus just to name a few. The question is where will this audio be outputted? Through the typical coaxial-optical output? Well if a disc contains this fancy audio, there are no receivers out there to decode it at this time. Are some of those receivers that can take upgrades be upgraded to decode those new codecs. OR is this going to be another SACD-DVD-Audio game where the machine will only output these "identical to the master" audio tracks through 5.1 analog output audio cables. If that is so, what is somebody owns a SACD or DVD-audio player at this time and elects to buy one of these new machines and only has one 5.1 channel input on his receiver. Does that mean that you would now need a switching box for muliple choice audio tracks between two machines? 'Seems like that to me. O' maybe all new receivers should have two 5.1 analogue inputs. This whole audio business has gotten out of hand all over "copying" issues. If DVD-Audio and SACD audio was outputed through a coax or optical cable as it should have been, it might have become more successful.

I also thought about something else. Some of the movies that will be released in HD-DVD that also may contain the newer DTS and Dolby multichannel tracks might cause a problem with those movies encoded with matrix EX and ES center back surround channels in addition to the DTS-ES descrete channel if these audio tracks are analogue outputted. The receiver's decoder for these tracts do not have the opportunity to decode anything when analogue inputs are used, I TTTHHHHIIIIINNNNNKKKKKK.