The Elder Scrolls games have always been released on the PC as well as their most recent titles being console releases, but it seems that the team is now more comfortable doing things for consoles, specifically the Xbox 360 than the PC nowadays.
The Elder Scrolls V: Skyrim’s director Todd Howard stated in an interview with Edge Magazine that the team is “very comfortable on 360.” Though he also admits that “it will look better on PC. The PC has moved on a lot. With the kinds of things we do where we are streaming a lot, even your average hard drive on your average PC these days is crazy fast at ripping data.”
However he went on to say that “the negative on PC is that there are still a lot of layers of API before you can look at the hardware. So we might be able to get the data faster on PC, but what we do with that data is still easier on 360 and PS3 where we can look directly at the memory registers and do what we want. This is our third go around on these systems, so we are a lot more comfortable than we used to be.”
Practically everything shown at events, given trailers and screenshots have been from the Xbox 360 version of the game, which is a rather good strategy in my opinion as it does not raise hopes for console gamers about insane graphics that will probably be seen on the PC version.