The only thing about that which worries me is that Mass Effect 2 by comparison, is a 2-disc game.
At the same time it does make sense though. ME2 was much more Linear, so it was easy to decide where and when to split the content. How would you go about doing that in an Elder Scrolls game?
Player: "Hey can I borrow the forge for a minute? I want to try upgrading my armor."
Smith: "Sure can. Please insert disc 2!"
You: "FFFFFFFFUUUUUUUUUUUUU-"
There's nothing we can do about it. For whatever reason, the 360 is popular enough to be the single most popular of the three "powerful" platforms in North America while Microsoft had the dual fatality of not having hard drives in some 360s (therefore preventing mandatory installs) and by having a limited and outdated disk format (DVD). It's a sad state of affairs as either one of those things being different would result in a better situation and developers, especially Bethesda, are focused on catering specifically towards the 360 this generation... but what can you do? :shrug:
The Blu-Ray movement was only just coming out of a uterus at the time. But your point still stands.
-DL :chaos: