World of Warcraft Could Become Obsolete

After hearing several MMO makers issue challenges on WoW, it seems the starkest critics are at Activision-Blizzard itself, as per CVG's report.
'Future increased consumer acceptance and increases in the availability such games or other online games, or technological advances in online game software or the Internet, could result in a decline in platform-based software and negatively impact sales of our console and hand-held products. Newer technological advances in online game software may also render products such as World of Warcraft obsolete. 

'Additionally, direct sales of software over the Internet by competitors could adversely affect our distribution business.'