I think it should be noted that the Wii wasn't necessarily as huge a success in Japan as it was the West. PS2, Famicom, PS1, and Super Famicom sold in Japan 21.980 million, 19.350 million, 18.855 million, and 17.170 million respectively. Wii sold about 12.75 million. https://sites.google.com/site/gamedatalibrary/hardware-totals Where as world wide, the NES and SNES sold noticeably lower than Wii, Wii sold far more in the west than prior Nintendo home systems, and in Japan it din't necessarily expand the audience for home systems like it did in the West, nor did it need to, Wii kind of showed that a casual focus doesn't work in Japan. For comparison, Wikipedia lists world wide Wii sales as 101.63 million, NES sales as 61.91 million, and SNES sales as 49.1 million. In Japan Switch is selling faster than Wii of course, and I think it has a great chance of selling even better this year with AC DQ and Pokemon alone, not to mention a possible switch mini and Monster Hunter, but it does mean a bit more when Switch is outselling Wii in America.