World of Warcraft peaked with 11.4 million players worldwide at the launch of World of Warcraft: Wrath of the Lich King, but it seems that the decline has been stopped for now. The number of active players holds steady at 10.2 million, the same number that Activision reported in their last quarterly statement.
Remains to be seen if Diablo III will divert some of the current WoW players or if it will only help build the Battle.net user base.