I don't know. There is alot of buzz around the Xbox360, and may indeed sell more units than the PS3. So the real question is 'will Nintendo beat Sony?', in which I would have to say no. I'm sorry, I just don't see them climbing above 3rd place. However, I am pretty damn sure that they will sell alot more units than the GC and N64, and would very possibly leave a narrow gap between 1st and 3rd place, and could claim the greatest net increase between this gen and next gen.
So in conclusion, yes and no.