There is no guarantee what will happen in 8 months, for all we know, the tables could turn and iether the PS3 or 360 could take off while demand for the wii cools down.  It's not guaranteed, but weird things have happened in the past.

The end of this year is definitely a wild card for everyone. With huge game releases and a plentiful supply of all three system, Holiday 2007 will be one of the most important periods during this console generation for all three companies. I wouldn't be surprised to see Sony or MS eek out a month with the Wii right behind them.

Dec is the best guess, but I still think the Wii will come out ahead. The PS3 won't win Dec - I think we can all accept that. At best, the 360 will do 3m units (wildly optimistic I think) worldwide in Dec. I think it did about 1.6-2.0m last year (with GoW, and little competition from sold out Wii/PS3 stocks). I think the Wii will easily do 1.2m in US, 800k in Europe, and about 1m in Japan - also giving it 3m. And those numbers are more conservative. Unless the 360 can pick up sales in Japan, it will not be able to threaten the Wii monthly anytime soon (the Wii has sold more in Japan, than the 360 has in the US by about 2:1 last month).

 I'm not saying they won't have sales, but they won't affect Wii sales either, Wii appeasl to a much larger group

Ive been saying the same thing. Mostly in the news articles here. Everyone is expecting the Wii to decimate this holiday season. Sure it has the POTENTIAL to, but will it have the supply? If there are 1m people out there in December that want a PS3, you better believe they wont have trouble finding them on shelves. But Wii's? Its looking like the Wii will be constrained ALL THE WAY UP UNTIL THE HOLIDAY SHOPPING STARTS. Some people need to digest what that will do to Nintendos ability to get the console stacked up in retailers back rooms. If they sell when they hit the shelf then the retailers wont have a surplus. And not only that, you see Nintendo is constrained WORLD WIDE. Explain to me how in the hell they will go from zero Wii's on shelves to the MILLIONS needed on shelves to fulfill demand this November and December in the US, EU and Japan. Seriously. PS3 and 360 can do it because they both already have consoles languishing on the shelves, by this holiday season the surplus of PS3's and 360s will be massive. Millions available in all 3 territories waiting for a home. The Wii? Not so much.

Im still predicting November and December NPD's show Wii getting its arse handed to it by both the PS3 and 360. Not due to a lack of consumer intrest but a lack of supply.

As people have said, if the Wii supply remains low going into the holiday season due to high demand, the 360 could possibly win December in the US due to having more supply. At this point, I don't think the 360 will outsell the Wii world wide in any month within the next couple of years. And there will be a lot of sad kids who wanted Wiis for Christmas and a lot of moms who waited in line to get them. Again.

As video game fans, I'm sure everyone here really wants Nintendo to be able to get a few million units on shelves for the holiday season so that customers can have whichever console(s) they want for Christmas.  Last year a lot of people got xbox 360s out of frustration when unable to buy the Wii.

 I wonder if the Wii continues to sell out into 2008 will people still call it a fad

There will be plenty of supply for Xmas 2007, don't worry about that. Whether is still sells out - is another question. Nintendo could supply 3m for US, and it could still sell out. A lot will depend on whether the Wii continues to sell out - even with larger shipments coming in. If it doesn't - Nintendo can stockpile. If it does - Nintendo may have to cut supplies to stockpile (something I hear they are doing anyway). Anyway - we'll see in a few months. A lot can happen between now and then ;)

I agree about the supply constrains. US has longer shopping season than Europe or Japan, so i think that in november US gets bigger share of Wiis than usual, compared to others, and december situation goes back to normal. But it's all about supply issues. Besides, if stores have large amount of PS3:s (by making stupid deals or Sony blackmailing retailers again), retailers may even sell PS3 on sale.

I guess it come to whether you believe Nintendo is stockpiling some consoles for the Christmas rush or if they can up their supplies. I think if Nintendo doesn't win worldwide combined monthly sales it will be because of supply. I guess if I had to pick a month it would be December. The 360 needs to sell over 2 million in December to take it. I have a feeling Nintendo will have 2+ million units ready for Dec. Just a guess.