It's my understanding that Blu Ray players will play standard DVD discs and CD's. Is this correct? Also many will play SACD.
Blu Ray movies don't have both standard and high def versions on them though. Correct?
HD-DVD discs do have both formats recorded though and you can put an HD DVD disc into a standard DVD player and watch the standard version. Correct?
If this is correct, could you watch the standard def version of a HD-DVD disc in a Blu Ray machine if you did happen to buy the wrong format...I mean the loosing format...I mean. ^_^ You get what I'm saying.
Blu ray players will play cd's and standard def dvd's, as will HD DVD players, both will upconvert standard def dvd's as well. Blu ray discs are not dual sided, with the HD movie on one side, and SD movie on the other.
Not all HD DVD discs are dual sided, only some, and as far as playing the standard def side of a dual sided HD DVD in a blu ray player, I don't see why it wouldnt't work. If I come across another one, I'll pop it in my PS3 to see what happens... I would have tried this for you a week ago while I still had Oceans 13 at the house.