$400 for a switch is too much, I don't care if it can use DLSS to run at a higher resolution.
Right now I buy switch games that I might also own on pc or console because I want to play it without using my TV but if they start charging $400 then I'll just start using available solutions to stream from my pc to a tablet or my phone.
The switch form factor means something powerful enough to be competitive is completely out of the question. Between cooling and battery life anything but a mobile SOC would be too much.
Now if it's $300...fine but only if it has a nice OLED and analog triggers. Even the pro controller doesn't have analog triggers and that's ridiculous.