Current Totals:

GTA4 PS360 Combined - 10,015,834
Wii Fit - 6,254,696
GTA4 360 - 5,766,396
GTA4 PS3 - 4,249,438

So Wii Fit is currently 3,761,138 behind GTA4 PS360 Combined...

Last Week:
Wii Fit - 244,587
GTA4 PS360 Combined - 67,319

So Wii Fit is currently catching up at a rate of 177,268/week

That means that in 22 weeks, Wii Fit would surpass GTA4 PS360 Combined at the current rate.

There are 22 weeks left to report on this year...so it is possible to happen this year...

Helps:
Wii Fit has better legs than GTA4 PS360
Wii Fit production may be increased, but won't decrease
Wii Fit is still sold out, so demand>supply

Hurts:
Wii Fit can only sell what is shipped
Holidays will mean good GTA4 PS360 sales while Wii Fit will still be shipped=sold
As ps360 consoles are sold at a greater rate this fall, so will GTA4
Wii Fit only averaged 135k greater sales than GTA4 PS360 Combined the past 5 weeks averaged

Conclusion: It is inevitable that Wii Fit will outsell GTA4 PS360 Combined, but it has only maybe 50% chance of doing it in 2008 because Nintendo is conservative in production.  It will easily pass it by next spring.  If we had current production level data, then we could make a more accurate estimate (are they stockpiling them now for xmas, or does shipped=produced??)

note: this only pertains to PS3 and 360 sales, not PC sales

And what would this prove? I mean, whats the point? I can argue that you are compairing apples to oranges, and say that WiiFit is not a game, while GTAIV is one. I just am not getting the point of this compairison.