Currently the Wii is at 25m. In 3 years time from now, they will have produced ~105m units. If they kill it 3 years from now the console will have only lasted 4.5 years. That is a really short life span for a game console. This is of course assuming they don't reduce the production rate for the next 3 years.

 Currently the Wii looks like it will have a 6-7 year life span, with the last few years with reduced production rates. So I would assume they are going to produce at least 150m lifetime.

 So unless you believe that Wii HD will come out within 3 years time from now, there is no way the lifespan won't be long enough. Nintendo would be commiting corporate suicide if they ditched the Wii within 5 years of release.

Incredible. There's no stopping Nintendo! :p

Look at the "per region" charts, its more telling:

Japan:
http://vgchartz.com/hwlaunch.php?cons1=Wii&reg1=Japan&cons2=PS2&reg2=Japan&cons3=PS3&reg3=Japan&weeks=156
(PS3 really suffering actually, Wii now getting ahead of PS2)

Europe:
http://vgchartz.com/hwlaunch.php?cons1=Wii&reg1=Total+Other&cons2=PS2&reg2=Total+Other&cons3=PS3&reg3=Total+Other&weeks=156
(PS3 doing well, only falling behind a little)

US:
http://vgchartz.com/hwlaunch.php?cons1=Wii&reg1=America&cons2=PS2&reg2=America&cons3=PS3&reg3=America&weeks=156
(PS3 around half PS2 sales, Wii starting to kick away from PS2)

^you should probably use Europe as opposed to "others" for that second graph.

http://vgchartz.com/hwlaunch.php?cons1=Wii&reg1=Europe&cons2=PS2&reg2=Europe&cons3=PS3&reg3=Europe&weeks=156

Your coment can stay the same.

  Off topic: I have a question: Do you guys think the Wii selling faster than the PS2 is due to the new demographic (soccer moms and such), or is it that PS2 owners of last gen just decided to update sooner this gen? I know both these things are happening but... which of those reasons the high sales lean towards? I always thought that like 70% of the Wii's userbase was made of new demographic, but had no facts to backit up.

The Wii is too broad to pin down as largely being one demographic. You get the following (in no particular order)

1. GC moving to Wii
2. PS2 gamers moving to Wii
3. HD console owners looking for something different or supplemental.
4. New young gamers who are just getting their first console.
5. Returning gamers that stopped gaming years ago.
6. Casual game market.

GO WII!