Its possible its just a home console. Build a Switch Pro home console to match the existing Switch Pro Controller.
like this lazy mockup
It would make sense for Nintendo to have 3 types of Switches for different ways to play the same games, each shipping with different controls.
Switch Pro - home console + Pro controller ($300)
Switch - hybrid system + Joy Cons ($300)
Switch Lite - handheld with built in buttons ($200)
But its not gonna render games at any higher than 1080p. It could just have a 4K upscaling chip and HDMI 2.0 out port.
Nintendo can keep selling the regular Switch for its unique hybrid system nature, while pushing the Switch Pro as the best way to play on TVs, especially 4K TVs. And if its a dedicated home console, they can overclock the SoC to get some extra performance out of it.
Then in like 2022 or 2023 they can launch a true next gen Nintendo Switch 2.0 that has exclusive new games, etc.