At the bottom of this post is a link to a blog post I made August 25, 2016. In it I predicted the success of the Nintendo Switch (or NX). I also spent a lot of time explaining how the PS4 Pro (Neo) and XBox1 X (Scorpio) wouldn't do much. There was a common narrative at the time that Switch would fail, because of the other companies' upgrades, and I was dispelling this myth.
I didn't give a number at the time, but I probably would have said in the 100m-120m range.