i got it from witeout's post jjseth
"A little math for people:
PS3: 4.11 mil in 38 weeks, avg 108,158 sold per week
360: 10.32 mil in 89 weeks, avg 115,955 sold per week
The 360 has a lead of approx. 6.21 mil consoles, with an avg lead per week of 7,797.
If we assume the 360 continues to sell at the rate they are, the increase in sales the PS3 would need, and keep consistent, in order to cross them by a certain date is:
January 1, 2008: (21 weeks) 280.6% increase (near quadruple)
April 1, 2008: (34 weeks) 176.1% increase (near triple)
July 1, 2008: (47 weeks) 129.4% increase
October 1, 2008: (60 weeks) 102.9% increase (more than double)
January 1, 2009: (73 weeks) 85.9% increase
April 1, 2009: (86 weeks) 74.0% increase
July 1, 2009: (98 weeks) 65.8% increase
October 1, 2009: (112 weeks) 58.5% increase
January 1, 2010: (124 weeks) 53.5% increase
Even with a 50% sustained increase, worldwide, of the PS3's current sales, even if the 360 sells at its current rate and NEVER sees a sales increase, it would take until sometime in 2010 for the PS3 to catch up."
Kimi wa ne tashika ni ano toki watashi no soba ni ita
Itsudatte itsudatte itsudatte
Sugu yoko de waratteita
Nakushitemo torimodosu kimi wo
I will never leave you