Compared to many of the other eye-candy GI covers, Skyrim's cover looks... bland... It isn't anything new that we haven't already seen, it doesn't really stand out and make me go "wow! I want to read more about this game!" Contrast it with http://www.gameinformer.com/b/news/archive/2010/04/09/may-cover-revealed.aspx - now that one piqued my interest.
Not really, minimalistic and mysterious stuff attracts much more interest by curious people. Plus, it got that cool 3D special effect that Miller mentioned which will draw a lot of attention.
And just like Benrahir said, that Bulletstorm cover is childish...