It's clear the drop is due to the Music genre no longer being such a beast. Whether this is due to the recession meaning peoples refusal to pay $100+ on one game, or just the genre has been milked and is now suffering cause of it. Plus most people have the instruments now, so buy the cheaper solus editions.
I think the other big factor was Modern Warfare 2 - the game was just so huge alot of people haven't bought another game yet. Last year consumers would have maybe bought 2-3 games as there was no huge big epic title that took nearly all the industries hype. Not to mention about 12 games being delayed due to MW2.
Next year should be interesting, the line up for the first 4 months is absolutely amazing at the moment and some big games are gonna get hurt, or delayed. If next years xmas line up for the 3 consoles has some big hitters (MGS, Natal, Wii Vitality, Halo Reach etc) I think 2010 will smash 2009 (And possibly 2008) simply because the year as a whole will be so strong.







