Remember Oblivion, Fallout 3 and New Vegas when you entered dialogue it would crash zoom up close to the NPC and time was frozen still outside the conversation?
In Skyrim they changed all this and acted as though the background carrying on in real time during the conversations was a step forward.
This also presented a major problem though. I clearly remember when out in the wilderness I had one of those random encounters where a stranger approached me and was asking me to hold onto an item that he will try and collect back from me at a later point.......however during the conversation a sabre cat came and mauled him to death before the conversation concluded. And during the conversation you are still unable to perform any combat moves......so it was literally impossible to stop him from getting killed during the conversation.