The first glimpses of concept art for DAIII have been posted over on the bsn, and can be found in the following link:

There are three seperate images: the first perhaps showcasing the new, "more open" style of Origins, while the second shows what appears to be an Elvish/Tevinter ruin while the final is a secluded fortress located in an as of yet unnamed location. While concept art is a hard thing to judge a game by, what can be seen so far seems interesting, to say the least.