I am curious about the last generation, Wii, PS3 and Xbox 360, of how many units there will have been sold for each one then all goes out of production.

I tried to research this a bit and found out that Nintendo had discontinued the Wii in Europe and Asia, but is still on sale for the NA market. About the Xbox 360 I found no actual statement about production but that they will support developers until 2017. For PS3 it would be in production until 2015.

Wii is still on sale in North America for some time.
Xbox 360 is still on sale in all regions and could be until 2017.
PS3 is still on sale in all regions until 2015.

As of today they have sold as followed:
Wii - 100 million
X360 - 80 million
PS3 - 81 million

(If the years or any info is not correct please let me know and I will update it.)

So, how much do you expect each to have sold when all of them has gone out of production? When exactly this will happen we can not know for sure, the PS2 lived on for a very long time and it seems like both Microsoft and Sony plan to have theirs in production for as long as possible.

wii: 110 million
ps3: 100 million
360; 90 million

If china opens up and consoles goes there:

wii: 160 million
ps3: 120 million
360: 100 million

Remember, its my opinion!!!!

It's a tough call. I'll say.

Wii: 103M
X360: 92M
PS3: 95M

Wii: 102million
PS3: 108million
Xbox360: 95million

This is purely assuming that the PS3/360 are still to selling in 3-4 years time.

Yeah it's mostly about assumption since it's difficult to know exactly how long they will be in production.

But with the little fact we have to go on I would say something like this:

Wii: 105 millions (no idea if it will have a chance to reach five more millions in NA)
PS3: 110 millions (if PS2 could go bananaz on it's deathbed(last active years) I am positive that PS3 will too)
X360: 90 millions (I think MS will shut off their production earlier than they claim)

Wii - 103m
PS3 - 97m
X360 - 92m

Wii - 102M
PS3 - 105M
360 - 95M

Wii: 103 Million
PS3: 109 Million
X360: 106 Million

Wii - 106 million
X360 - 98 million
PS3 - 110 million