I dont believe the PS3 will ever reach 40 million by the end of the generation.
You may not know, but we are reaching the middle of this generation and if the PS3 couldnt get the rails on it, it will never get them.
I almost can tell it wont reach 35 million, no matter how cheat it is, the GCN was at only U$99 and with great games, still was outsold my X-Box and PS2, the DC had a similar pattern, could get into the mass market and was outsold my the PS2, in the middle of that generation barely sold 200K everyweek.
Too bad for the PS3 fanboys but i m pretty sure and with lots of evidence of what i m saying.