360 will maintain its lead over the PS3 in 2010.

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Alan Wake>Heavy Rain. Alan Wake will outsell Heavy Rain.
Fable 3>God of War 3. Fable 3 will outsell God of War 3
Natal>Sony Wand. Natal has more too often and more marketing = more sales.
Halo: Reach>Gran Turismo 5. Halo: Reach will outsell Gran Turismo 5.