You're going to be disappointed. And I'm saying it as Nintendo fan. Don't get your hopes too high.
If the form factor of the Swtich 2 remains the current I don't think we can expect much more than an OG PS4 in terms of pure horsepower (docked). Sure new tecnhinques like VRS ajnd DLSS will give it an edge but even after that I think we can expect something more akin to a PS4 Pro in the best case scenario. If we're lucky some next-gen games that will run at native 4k; 120fps on Xbox Series X may run on next-gen switch 60fps at non-native 1080p.