I'm sorry but if you think that the PS3 hardware sales will INCREASE as the years go on. You've lost your mind.
Plus in order for the PS3 to catch up to the PS2 it would need to sell 100 million more units. 3 TIMES the amount it sold now.
A system this old cannot sell 100 million more units, I do think the PS3 will get into the 60-80 million range but 137 million is too far off.
"To play or not to play, that is the question."- A wise man
Lifetime sales prediction
Wii 79/150 million
Xbox 360 47.7/73 Million
PS3 43.6/69 Million