Of course the OP deserves kudos for such a prediction. I remember back then, and even some months/years later, anyone who called such a low figure for WiiU's lifetime sales was considered crazy. Now everyone knows 40 million is far too high, but in 2012 it was one of the lowest predictions one could find. I would say that, in 100 predictions, this would be certainly in the top 5. I think that I personally have never made such a good prediction.
Prediction made in 14/01/2014 for 31/12/2020: PS4: 100M XOne: 70M WiiU: 25M
Prediction made in 01/04/2016 for 31/12/2020: PS4: 100M XOne: 50M WiiU: 18M
Prediction made in 15/04/2017 for 31/12/2020: PS4: 90M XOne: 40M WiiU: 15M Switch: 20M
Prediction made in 24/03/2018 for 31/12/2020: PS4: 110M XOne: 50M WiiU: 14M Switch: 65M