Fixed that for you
Seriously, the Xbox One already starts seriously trailing behind the Switch by over 250k (780k to 1035k). At the same time the Switch is only 295 units behind the PS4 in US sales this year according to VgChartz, so Nintendo is a much bigger threat right now even in the US.
Nothing is a threat for sony.
Ps4 install base is extremely bigger then switch.
My youtube gaming page.