Sony does. Also, the Wii isn't part of this generation. It only competes against the PS2, which is maintaining a lead over it's rival from Nintendo of almost 100 million consoles. Sony has graciously allowed the 360 to be named as being a member of the PS3's generation of gaming, but that was just generosity on Sony's part as the 360 is massively underpowered compared to the delaystation.
The only reason the 360 is ahead of the PS3 is because of people who got Rrod buying new consoles. Microsoft doesn't actually replace/repair them even though they all have a three year warranty, thats just a media conspiracy.
starcraft - Playing Games = FUN, Talking about Games = SERIOUS







