Nah, I'd say 70-75 million MAX.
PS1 only barely edged past the 100 million mark and it sold quite strong, for nearly 10 years. Sony can say PS3 will sell ten years all they want, but ultimately it's up to the consumers if that comes to fruition, and looking at the sales right now, it doesn't seem likely that it'll have the legs to carry on for another 7 years.