It's not that crazy to think a console will sell more in it's second year than it did in its first year, especially for PS3 which wasn't on sale for a full year in Europe in 2007.
Xbox 360 sold more in 2007 than it did in 2006. In fact I think that if you don't increase hardware sales every year than your system is a flop. With that in mind:
2007
Wii - 15-20 Million (Depending on Supply)
360 - 15-20 Million
PS3 - 6-7.5 Million
2008
Wii - 40-50 Million
360 - 25-30 Million
PS3 - 12-20 Million (Man PS3 is hard to predict)
2009
Wii - 65-85 Million
360 - 30-40 Million
PS3 - 18-35 Million (I got no clue)
The second year of a console should sell more than the first year. The third year should sell about the same or a little less than the first year. Each year after that should sell a couple million less until its phased out.
Currently Playing:
Xbox 360 - Rock Band, NHL 08, Skate, Halo 3, Mass Effect
Wii - Mario Galaxy
