Momentium and Inertia are the important factors when it comes to system sales over the next 12 months; the momentium these systems have built will prevent them from selling less than 75% of their current sales numbers and inertia will prevent the systems from selling more than 125% of their current sales numbers. This means that, regardless of whether you're talking about the best case or worst case scenerios for any of the consoles, the Wii will continue to build upon its lead and the PS3 and XBox 360 will continue to fall behind.

My prediction for 2008, PS3 sells like hotcakes in Japan compared to 2007 (360 sales fall flat). 360 and PS3 sales gap will narrow further or overtake for North America, Europe PS3 sales will significantly overtake XBox 360 total sales there.

Christmas 2008, PS3 sales starts to beat global sales of the Wii (have been called names for suggesting this with regard to 360 vs PS3 Christmas 2007 sales last year, now people may be a little more open minded).

Let's See... I think the PS3 will pick up steam, helped by GTAIV and MGS4 (and whatever other games I might have missed), and maybe begin to outsell the 360. (though nowhere near xmas #s of course)
The 360 will be steady, a great game selection behind it but no really big EXCLUSIVES (not GTAIV) coming.
The Wii and DS will continue to dominate, with SSBB and MKWII coming out along with Wii Fit, the system will continue to be sold out worldwide.
I doubt the PSP will still be a major player by year's end (except in Japan), unless something REALLY big happens.

I think 2008 will see MS and Sony turn very nasty toward each other as they realize that they're slowing grinding themselves into a stalemate. I expect both companies to aggressively slash prices in a race for 65nm GPUs and 45nm CPUs into 2009. Sony has the software advantage in 2008 while MS has the advantage of profitable hardware.

Meanwhile, Nintendo will be sitting in a corner, laughing their asses off as they continue to roll in money for the forseeable future.

Yes the Wii won 2007 but which company came in second? Sony.

Well, there's not much to say about Nintendo, so...

Microsoft:

Could have had better sales in 2007 if they had done a more substantial price cut. A price cut on the 360 in Europe is much needed, in America not so much but they'll probably do one in both territories in Q1 08.

Sony:

Had a pretty bad 2007 in general, but things got better at the end of the year mainly due to price cuts and PS3's first Christmas in Europe. This was much needed for the PS3. In 2008, they probably can't do any price cuts, so they have to hope for two things:

1- That Microsoft's price cuts don't have much of an impact.
2- That 3rd party games (especially exclusives) don't get significant delays.

dude, what i'm about 2 say is the complete and honest truth!! the biggest game the psp will have in its lifetime will be metal gear solid portable ops 2! (secret agent clank may move okay numbers!) other than that, I think that sony will unleash a psp2. (psp has performed disappointely for a handheld, but it is probably because this was sony's first try at the handheld market, and everybody is used to nintendo handhelds.) i bet that microsoft will anounce the xbox 180 in 7 years. (half the power of 360 7 times more powerful than ps2!!)

I think the key for Sony will be a game like LBP. We all know that GT5, MGS4 and FFXIII will come out and sell like hotcakes. But if LBP can come in and draw a whole new crowd of buyers while keeping the attention of the Sony faithful, it could be massive seller. It's visual style makes it attractive for all ages, while its apparent depth and gameplay should keep the hardcore crowd happy. I am very intrigued as to how this game will do.

I am also interested in how KZ2 will do, whether it is all bark or if actually does have the bite to go with it.

Nintendo will roll through 2008, with Mario Kart and SSB:Brawl leading the way. I think in 2009 we could see Wii sales take a bit of a dive, but that is merely speculation. I wonder how FF:CC is going to do. The GC game had pretty solid sales. I think it will have awesome sales in Japan, very good sales in Europe and modest sales in NA. However, I have a feeling that only Japan will see it in 2008.

The 360 is interesting. It still has some top notch potential games coming out, but most of its well known flagship games are out. There is still GoW2 though. I see the PS3 outselling the 360 Worldwide in 2008. I think they will get big advantage in Europe and even more massive lead in Japan. I think they'll definitely narrow the weekly gap in USA, especially when GT5 comes out. The release of the first GT game for the past two generations of gaming were the point where the PSX/PS2 hit a massive sales boom. I expect the same with GT5 and the PS3.

My views:

WII:

It will continue to dominate & WII FIT will only REPLENISH the momentum...

End of year sales - 25 Million......so that would be 43 Million LTD

XBOX 360:

In EU & JAP it will literally hit a "brick wall", only UK will somewhat save it in EU...

In NA it will continue to outsell PS3 UNTIL MGS 4 hits PS3..thats when things could change...

End of year sales - 6 Million......22 Million LTD

Playstation 3:

It will TAKE OFF!

With EU at the front (due to GTA IV) YES in EU GTA IV PS3 will OUTSELL 360
GTA IV 1.5:1 & JAP right behind it with DMC4 & WKS & MGS4

NA will dwindle a lot...it is unpredictable..

End of year sales - 9 Million OR 11 Million (IF FFXIII releases)....so 17.5 Million - 19.5 million LTD