People are already predicting success for the PS5 without knowing a damn thing about it. Reminds me of the talk just before the PS3 launch.
On the other hand we already know that the Switch is a successful console that is selling comparably to the PS4. Isn't it more logical prediction that the Switch will have the top spot for the next 4+ years?
Because of their track record. 3/4 of their consoles have been dominant and did over 100 million so unless they make another huge mistake like pricing PS5 $200-300 more than the competition than they should have another huge hit on their hands.
No, 2019 & 2020 are very safe bets for Switch to win as PS4 will see steady decline while Switch should be at its peak in those years. 2021 is also possible, it depends on how strong PS5 starts out and how much Switch declines that year so I'll say 50/50. 2022 will almost definitely be PS5 win, it will start to hit its stride while Switch will really be showing its age.