Just happened to notice that several shows and movies now have DD 5.1 sound via hbogo and roku player.Its standard dolby digital not the dd+ that netflix offers.Watching Cowboys and Aliens and it sounds great through my pioneer vsx 522k.
I noticed that too. I have been catching up on boardwalk empire and i was almost positive I remembered them not being 5.1 when I started but they have been lately. I thought I might have been mistaken and they were 5.1 all along but this confirms it.