Well if sony sticks to their 10 year plan then your talking about them averaging less than 4m units a year and considering some of the titles coming out next year alone, along with the inevitable long term price reduction, i think that 4m average is greatly underestimating the product. especially when it has averaged 9m a year at a 'too expensive' price.
I dont think we will agree on this one, i will get back to you on sale 50,000,001 lol
If at the end of the cycle we are at 49,999,999 i will gladly vandalise my sig with whatever you wish lol