This is what you expect?
1. Playstation 3 will sell 338K/week as an average, or 25M over the next 17 months. I find this reasonable.
Look at it this way:
For the next 3 months (up untill November) it should stay fairly steady on par with what sales have been this far the year. 3.5M is very possible.
For the 2 months, it sold 3.5M in 2007. Wii sold 6M. I expect it to see somewhere in the middle of that, as that's where the Ps3 has been this year. Right in the middle of Ps3 2007 and Wii 2007, maybe a little above. 5M seems fair.
Ps3 has sold 5.7M without a holiday season so far this year. It will probably sell a bit more than this next year in the same period, so 7.5M for 1st half of 08.
For the 3 months up to the holiday season, it could sell 5M, if things go right.
For the 2 months of holiday season, it now needs to sell 4M. That should be done easily.
I see all these numbers as possible. Yes, it's a bit optimistic, but it's possible.
2. You expect Wii to sell 35M, or 472K/Week for the next 17 months. That's pretty much spot on 2M/month. I find this a tiny bit low, but completely fair.
Why?
There is a holiday season in the next 5 months. Nintendo is likely to have stockpilled for this, so it should see extra numbers. And there is close to no change at all of a demand drop during the holidays.
If we foresee a 7M Wii holiday for the 2 months, which is only fair, as it sold 6M last year, when they had far less stock to pick from. This means that we're likely to see more than 40M Wiis by end of 08 - and maybe closer to 43M
If we say 40M, which is a bit pessimistic, Wii needs 25M sales in 09. For a comparison, it is likely to sell 23M ish this year, which is what it will need next year.
Sure, we are likely to see a grow, but how big it is going to be isn't certain. Remember, at the current pace, there aren't more than 29M Wiis to be produced in 09.
3. You expect Xbox 360 to sell 10M, or 135K/week for the next 17 months. This is very pessimistic
It has sold 4M so far this year, in a slow period, with no holiday seasons. It's likely to see minimum 5M combined for those 2 holiday seasons. That leaves it to average less than 100K/week to make 30M.
It is going to beat 30M, but by how much? I don't believe it is enough for you guys to justify your laughter.