Here is some further numbers for the argument:
YTD Sales North America:
Wii: 2,599,750
XBox 360: 1,483,916
PS3: 946,046
YTD Sales Japan:
Wii: 2,202,770
XBox 360: 135,277
PS3: 555,465
YTD Sales Others:
Wii: 1,724,562
XBox 360: 760,487
PS3: 1,171,265
YTD Sales Worldwide:
Wii: 6,527,082
XBox 360: 2,379,680
PS3: 2,672,776
So worldwide the PS3 and XBox 360's combined sales are (roughly) 75% of the supply limited Wii sales; it would not be outrageous to say that if the Wii had a limitless supply the PS3 and XBox 360 combined sales would be (roughly) 50% of the Wii sales.
Sales like this can not continue for long before third party development resources are reallocated to match the sales of the systems. Can the PS3 and XBox 360 mount a comeback when they have half the development resources and twice the development costs (implying 1/4 the games) of the Wii?
