If you've seen the picture of Azura's shrine the scale of it compared to the player was incredible (can't link sorry, but if you search the other Skyrim forums you may find it somewhere...) and it's the epic scale of stuff like this which is looking set to making Skyrim that much more visually impressive than Oblivion, that's without looking at the other improvements of detail they've given to almost all other areas of the game. I'm hoping the rest of the world has huge environments and structures like this one.