User blog comment:Wiseman of the Wastes/Dawnguard trailer released!/@comment-4098980-20120531231631/@comment-3076045-20120602014824

Because sales-wise, the ratio of puchases from xbox and PC were significantly higher than those of PS3. (Oblivion and Skyrim both). Heck - there are a lot of stores that STILL have the "special edition" PS3 version of Skyrim. (7 months after release)