As of today 3DGO! now streaming in DTS 5.1
At least for LG webOS 2.0 (2015) 3DTVs. That is great news. Blu ray picture quality now has upgraded sound quality to match. However 2014 3DTV owners (like me) are out of luck. Hopefully the sound upgrade is coming for all TV operating systems (although to be fair I didn't even notice that it wasn't DTS 5.1 when I watched a couple movies last week).