I think Sony will struggle to break thirty million consoles. I think economic trends indicated a dark time for gaming in general. Too much disposable income is going into petroleum. Hobbies are the first thing to feel the economic pinch. Obviously its a little early to judge, but I live on top of an oil field, and they are predicting we will be over four dollars a gallon in a couple months. I am already tightening my wallet. At this point you would be making a very hard argument for me spending four hundred dollars plus tax on a new piece of hardware.
I hope you don't take this the wrong way, but I felt that the console sales estimates this generation thus far have been very inflated for the most part, and a rotten economy only pushes the trend in reverse. I truly do not see any current generation console breaking eighty million. I do not see this current generation globally exceeding one hundred and fifty million. Unless economic pressures subdue somewhat. Right now the future isn't looking all that bright.