Let's actually have a Nintendo console achieve 1080P/60fps consistently first before we start drooling over 4k/120fps.
Tegra Orin should be able to beat the Playstation 4 hands down and that should release next year and be cheap/mature enough for a 2023 console inclusion for Nintendo.
The video showed that you can offer 1080P/60fps with internal 540p resolution. https://www.youtube.com/watch?v=YWIKzRhYZm4
To get 60fps, it is virtually there with some dips. The author of the video mentioned that by turning of one or two ray tracing options it could be better achieved.
So in theory, Nintendo Switch would already easily hit it using DLSS 2.0.
Quite a fantastic technology actually.