PS4 ~73% Marketshare in 2017 (XB1 ~25%, Wii U 2.2%)

[Tryklon]

Switch will probably reach 5 million units worldwide by the next christmas (maybe more if Pokemon is release by then), which will completely obliterate WiiU's 13 million units the whole lifetime. It's really a conservative prediction really, since the first week already put almost 2 million units on user hands.

Xbox will probably never recover to the PS4, the decision to bring it's exclusives to the PC was idiotic to say the least... I know many people who already sold theirs, since they can play at thir PC, and chose to keep only the PS4 for exclusives.