Happy to see all 3 manufacturers do so well 
PlayStation has Europe in the bag and Switch has Japan in the bag. But US is an interesting market where all 3 have very healthy sales.
For now, PS4 has won 5 of this year's 11 months (January, February, May, June, and November), Switch also 5 months (March, April, July, August, and October) and SNES Classic 1 month (September). If you exclude SNES, Switch has 6 months. Can't wait to see December's numbers.
January:
PS4: 210,665
XB1: 157,545
February:
PS4: 398,407
XB1: 215,418
March:
PS4: 396,726
XB1: 243,514
Switch: 910,545
April:
PS4: 206,247
XB1: 109,950
Switch: 280,897
May:
PS4: 187,182
XB1: 109,130
Switch: 165,038
June:
PS4: 381,196
XB1: 153,389
Switch: 215,582
July:
PS4: ~217,000
XB1: ~120,000
Switch: ~222,000
August:
PS4: ~190,000
XB1: ~116,000
Switch: ~210,000
September:
PS4: ~305,000
XB1: ~175,000
Switch: ~314,000
October:
PS4: ~220,000
XB1: ~115,000
Switch: ~295,000
November:
PS4: ~1,582,000
XB1: ~1,376,000
Switch: ~850,000
December:
PS4: ?
XB1: ?
Switch: ?
2017:
PS4: 4,297,423
XB1: 2,890,946
Switch: 3,463,062