You could both be right...
(Earl Grieda's addition: the leading market-research
firm tracking gaming, the industry took in $11.7 billion (all figures U.S.)
in domestic revenue in 2002 — more than the $9.5 billion in annual U.S. box
office receipts reported by the Motion Picture Association.)

Resale places like FunCoLand do a brisk business as kids grow out of Tetris and
Mario Bros and trade them in for more complex games. I'm sure the industry's
happy to count the resale of popular games among its total figures.