Well yes, it probably will.
ZhugeEX said that Xbox One was roughly 35 million by the end of 2017, and based on that I'll put them around ~38 million as of now.
My guess is Q1 2020 for the overtake.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.