Having a full detail 3D model to move and rotate while waiting is such a great, simple idea and it will make loading screens much more bearable than just looking at a static image for a couple of seconds. The huge amount of objects and models in the game means lots of diverse load screens I think.
From what I've seen it looks like this game has one of the slickest interfaces I have ever seen in a game, I have literally never been this into a game before it came out, it's crazy.