Is Wonderbook the PS3's killer app?

[Barozi]

man-bear-pig said:

Wonderbook's weekly global sales:

Week 1: 13,855
Week 2: 22,039
Week 3: 44,221
Week 4: 84,242

I know the reason for that. Week 4 includes USA W1-W4 sales (20k) instead of only W4 sales.