I'm glad somebody brought this old thread back to life. I remember predicting a few years back that 3ds would eventually reach 80m and many people said I was crazy. But it will likely get there eventually.
I doubt 3DS will make 80m, its dropping at too fast a rate being down 65% in shipments this fiscal year.
It will come close but probably miss by a few million.
When the herd loses its way, the shepard must kill the bull that leads them astray.