Make your call: how long until Switch exceeds "X1family".

[killeryoshis]

Here is what the Xbone sold by year with lifetime sales in parathenses

2013 : 3 Million (3 Million)
2014 :  7.9 Million (10.9 Million)
2015 : 8.6 Million (19.6 Million)
2016 : 8.3 Milllion (27.9 Million)

Switch sales for the year so far is 5.3 Million
So if I made rough estimates future Xbox One sales could look like this

2017 : 8.3 Million (36.2 Million)
2018 : 8.3 Million (44.5 Million)
2019 : 5 Million (49.5 Million) (This year really depends on a Xbox 4 relase or not)
2020 : 4.5 Milion (55 Million)

Now let's  compare the Switch 

2017 : 14 Million (14 Million)
2018 : 17 Million (31 Million)
2019 : 19 Mllion (50 Million)

Now assuming the Switch gets more support as time goes on and the Xbox One contiuing with steady sales. The earliest the Switch can pass the Xbox One is very late 2019. The latest is 1st half of 2020. Honestly if Microsoft release the Xbox 4 late or doesn't release it at all than post pone everything I said by a year.