Unless something drastic happens: yes, it will.

That's a lock.

Pretty easily, the real question is how much farther it can go.  I'm more curious if it can beat Game Boy's 118m and claim 3rd place overall historically?

Wii will at least hold the distinction of being the only single model of gaming hardware to ever break 100m.  No version of PS1, GB, PS2 or DS did that afaik.

Yes it will but I don't think it will pass PS1.

Obviously. The only scenario where the Wii will fail to sell 100m is if Nintendo pulls the plug, which would be bizarre and stupid.

Once.

And it will clear it by about 10/15 Million units.

PS1 only did 102m iirc.  You think Wii will stop at 101m?

I thought it did 115 Million

It almost certainly will, I expect sales of roughly 115m worldwide

When the Wii launched I didn't think it'll break 60 million. I think it will break 100 million in 2-3 years.