From September 2015:
How some people thought it would only sell 80M is beyond me.
I can do one better. Predict When will PS4 Outsell Wii
Only 4 months ago people saying PS4 would never outsell the Wii, and probably a lot who said that still believe it now.
Predictions (Made July 2019)
LTD: PS4 - 130m, Switch - 110m, XBO - 52m 2019 : PS4 - 15m, Switch - 18.8m, XBO - 4.8m 2020: Switch - 22m (Peak Year)