I agree on all of this except the "carefully staged" which really depends on the type of image being made. Some are, of course, but many, many are not. Way to often news places and sites think all screenshots like this are all carefully staged. Not so. My game actually looks like most of my general shots while playing. Staged ones tend to be pretty easy to pick out. Yes I don't bother to show a shot where I might have some clipping from an animation on an armor or an area where a ground texture has a bit of a seam with the road but for the most part if you were to look at most of my skyrim images on Flickr they are me in the game world playing. Mainly because my style of screen taking is focused on just being in the world playing. I don't get into the artsy style that many people do - and those are very staged and heavily dependent on tweaks to ENB settings. But again easy to tell those shots from shots taken from just playing.
Just want to be very clear on that. Many screen archers do a great deal of staging with characters, some even edit things in PS (which I dislike as to me the point is to see what you can push the game to do), but many folks just have a very nice looking game.
All that being said I have such a nice looking game for four reasons:
1 - I have a powerful PC that can handle high quality graphics
2 - Modders have provided an awesome variety of textures and meshes to install to make the game look better and fix seams, clipping, and other issues in vanilla.
3 - Graphic Presets, primarily SweetFX and/or ENB. These are the most powerful tools to make the game look better.
4 - My own patience in testing and choosing the right mods and textures to work together to make the game look nice.
If you were to watch me play standing over my shoulder at the PC you would quickly realize my game pretty much looks like my shots minus those that are staged for effect - like using FOV 15 for a character close up or exaggerated DOF. I am mainly talking here of general landscape images and characters in action.
I took these shots just running around last night. No staging beyond using TFC so I could free up the camera to show off how nice the landscape looks.
However the vanilla game? Bleh. While I got over 400 hours on vanilla (was before I knew about modding or graphic presets) I could not go back to that ever again. Love the game but what keeps me playing still are the mods and graphic overhauls you can do with ENB.
PS - Sorry I always look for an excuse to post screen shots - bit of a junkie with them
EDIT: The above is also why so many still play. Even people with moderate machines can have a damn fine looking game with just a little effort in mods and taking the time to use an ENB preset.
Of course it is not vanilla but IMO the game is made to mod so you have to take that into at least some consideration when judging it.