It's possible. I mean we've got Animal Crossing: New Horizons out in March. This is the first time since the Switch's launch that such a huge Nintendo game comes out in the 1st quarter. If Breath of the Wild 2 comes out in 2020, or a yet-to-be-announced Super Mario Odyssey 2, that would help too.
Third party will probably peak in 2020 before the holiday 2020 releases of Project Scarlett and PlayStation 5. Plus long-rumoured Switch hardware revisions will almost certainly start in 2020 at the latest.
And fingers crossed they fix some of their online service and give us a lot of classic games by next year.
Lifetime Sales Predictions
PS4: 122 mil (was 100 million) Xbox One: 55 mil (was 50 mil) Switch: 79 million
3DS: 77 mil (was 73 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima