I have a late 2012 iMac that is maxed out (680mx). I am thinking about purchasing two thunderbolt displays to go with it, but I am wondering if it is possible to span apps across each display. For instance an equivalent of eyefinity, where a game will expand all of the displays. I don't know if there are actualy OSX limitations on this or if it just depends on what the particular game allows. Does anyone have experience with this? It would mostly be for playing WoW.