Nice OP and numbers where we clearly see :
- gap is decreasing fast and going to zero despite a 1 year head start
- PS3 1st year sold more than 360 1st year
- PS3 2nd year sold more than 360 2nd year
- PS3 3rd year sold more than 360 3rd year
- PS3 4th year sold more than 360 4th year
All that with PS3 being a lot more expansive than the 360.
Looks like the PS3 was really successful after all... Or the 360 did terrible, your choice.