PS3 after 4 years on the market had sold 40 million console systems. Averaging 10 million per year. PS1 after its first 4 years on the market had sold around 40 million console systems. PS3 is selling on pace with the PS1.
Hate to burst your bubble, but Playstation 1 after 4 years was at 71 million worldwide...
December 31, 1995 to December 31, 1999 = 71.82 million
To expand on my post, the PS1 took around 9 years to break the 100 million mark, that was 4 years after the new generation started.
The PS2 had reached 100 million at just about 5 years, and after 4 years was at 81 million.
That means the PS3 if it wishes to follow the PS1 it is already ~30 million behind and if it wishes to catch up to the PS2 it is ~40 million behind. To outsell the PS1, it would have to sell for 8 years or longer after the new generation which just isn't going to happen.
The PS3 is tracking well below the past PS consoles and it looks very doutbful that anything could bring its sales up to those levels.