The PS3 is going to sell at least 35 million more consoles, which would be quite successful in my opinion, but hitting 100 million? I doubt it.
I think the $300 price point of the PS3 is worth another 5 million consoles, a $200 price point worth 25 million consoles, and $150 worth 5 million. Depending on word of mouth, increasing Blu-ray popularity, and other factors, I'm sure each of those price points could push more consoles, but it would take some luck.
Currently playing: Uncharted: Drake's Fortune, NBA2k11, Metal Gear Solid, Picross 3d