Are you trolling, or just blind?
On topic: Xbox One by the end of 2017: ~35m. By the end of 2018: ~43m. By the end of 2019: ~50m. By the end of 2020: ~56m. I am not putting much thought into this, merely using the same pace at which the console has been going since its launch with a small decline each year.
Switch by end of 2017: ~10m. By end of 2018: ~25m. By end of 2019: ~43m. By end of 2020: ~62m. A lot of guessing here, but since the Switch only recently launched and because the Xbox One is a moving target, I am picking the year 2020 and say it's definitely going to happen before the year 2021.