Right now the PS3 is at 2.47 million in Japan so it has to less 530,000 in the next 7 weeks, last year in 2007 the PS3 sold 405,000 from November 10 - December 29, and also we can't forget about White Knight Chronicles is releasing on December 25.
So I would have to say that it should be able to reach 3 million by the end of 2008.
Any other opinions?