Anything below 30 million in the console market makes them irrevelant no matter how people spin it. In the handheld market, I'd say atleast a minimum of 40 million units sold.
People have to remember that more hardware sold equals more software sales and bigger brand awareness. It's not a coincidence that 95% of the nintendo franchises peaked during the wii and ds generation. By having failures like the wiiU, it decreases their brand awareness and loses them many potential young consumers that could become life long fans.
Predictions for LT console sales:
PS4: 120M
XB1: 70M
WiiU: 14M
3DS: 60M
Vita: 13M







