If the rumoured advances of DLSS 3.0 are true, it really will do wonders. Assuming the Switch 2 is still years away and Nvidia will use the next gen 7nm tech for the mobile GPUs, I can see the switch being able to run games at 540p or higher using DLSS without much issues if the ps5/xsx are aiming for 4k. Obviously at lower settings than both the Ps5/XsX. But we will have to wait and see since you can never know with Nintendo. I do have more confidence on Nvidia though with their hardware decisions...
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850