It's interesting... according to Sony, PS4 shipped 9.6m this year, while according to Nintendo, Switch did 8m.
With that in mind, I think a comeback is totally possible these holidays, especially thanks to December.
Bet with Teeqoz for 2 weeks of avatar and sig control that Super Mario Odyssey would ship more than 7m on its first 2 months. The game shipped 9.07m, so I won