3DS -100 million alone
Wii U- 40 million
PS4 will probably do 100 million like PS1. Your prediction is a bit too ambitious i think.
However, the majority of gamers will own both PS4 and 3DS i think.
Xbox One, PS4 and Switch (+ Many Retro Consoles)
'When the people are being beaten with a stick, they are not much happier if it is called the people's stick'- Mikhail Bakunin
Prediction: Switch will sell better than Wii U Lifetime Sales by Jan 1st 2018