I bought a brand new 55XD8505 and set it up at home. The problem I have, is that as you can see in the video, the screen continues to change light during dark scenes. I'm guessing its a problem with the TV, or if it's something like a feature that can be turned off.
This has been worked out, by a very astute user in here that pointed out that it's the subtitles doing it. I'd say it's a flaw on Sony's side, not taking that into consideration for the dynamic light. But I'm so happy that there isn't something directly wrong with the TV.