That depends on two things. First two years sales figures and the sales curve. On average Nintendo systems seem to have their peaks in year one (3DS, Wii U, GCN, N64, GBA) or year two (Wii, SNES). Presuming that they'll reach Switch's 14 million target (the same as 3DS and Wii Y1 figures BTW), it can either follow year-one-peak curve, and in this case we're talking 3DS numbers (70-80 mil) or year-two-peak curve (100+ mil). Of course there's always the 3rd option ... the DS-Lite-factor. It's unlikely, but who knows. Anyways, it definitely has potential to be 100 million seller, but at the present time, it's just an educated guess. Next year though, we should see much clearer picture.