Considering the Wii sold over 600k last week, and considering a large amount of areas are now, once again, are in short supply, demand should still be high.
Supposedly production is at 1.8 million per month, that's really only going to be 2-2.2 million more by year's end.... unless Nintendo has been stocking a little... I only really see 17 million, unless a magic card is played.
I see demand high enough to sell 24 million by year's end, but the units are on the shelves. I mean, look at DS's amazing sales right now. 1.325 million sold in one week alone? That's insane. Wii could get close to that in due time.
Numbers: Checker Players > Halo Players
Checkers Age and replayability > Halo Age and replayability
Therefore, Checkers > Halo
So, Checkers is a better game than Halo.