It is impossible to truly know how many sales are "new" sales for each device.
1) MS had RRoD which skewed some sales
2) MS has rev'd a slimmer 360 skewing sales
3) Sony has rev'd a slimmer and changed console twice skewing sales
4) Themed consoles like Gears, Uncharterd, Halo, Final Fantasy, God of War, etc. skew sales
5) Change console colors and finish (Black, matte black, white, piano black, etc. skew sales
6) Changing hard drive size skew sales because most people don't unscrew their device to change the hard drive
7) Changing connectors by adding HDMI ports, Kinect specific ports also skew sales
8) Nobody knows how many people by more than one console in their house because they game in many places in their home
A better indicator of console sales is how well games sell. But this too only tells you demographics of people buying specific consoles than it does the number of consoles sold... In general (not always true):
1) Shooters sell significantly better on 360
2) RPGs sell slightly better on 360
3) Fighting games like SF, MK, etc. sell better on PS3
4) Adventure games like Tomb Raider and Unchartered sell better on PS3
5) Motion games sell better on 360
6) Lego games sell better on 360, best on Wii
7) Action games like God of War sell better on PS3
8) Racing games sell better on PS3
9) Games with heavy online gameplay sell better on 360
10) etc... etc...
Raw sales numbers only tell part of the picture, the rest is in the details which only Sony and MS truly know how well they have done. Both feel they are doing well enough to both release new consoles. That is good for gamers and we should support both platforms!







