New concept art for 2.0 is being revealed, including some nifty wallpapers! This post will be updated as more are revealed. For now, feast your eyes on what appears to be Ultima Weapon and Demon's Gate/Wall (both from previous FFs).
http://static.finalfantasyxiv.com/topics...4703_1.jpg
http://static.finalfantasyxiv.com/topics...4703_3.jpg
http://static.finalfantasyxiv.com/topics...4703_1.jpg
http://static.finalfantasyxiv.com/topics...4703_3.jpg