https://www.bloomberg.com/news/articles/2020-09-09/nintendo-said-to-boost-switch-production-by-another-20

"The introduction of a more affordable Switch Lite variant in late 2019 helped broaden the machine’s potential audience and Nintendo is making preparations for an upgraded Switch model and a beefed-up games lineup for 2021, Bloomberg News has reported. Several outside game developers, speaking anonymously as the issue is private, said that Nintendo has asked them to make their games 4K-ready, suggesting a resolution upgrade is on its way.

A Nintendo spokesman declined to comment."

I guess Switch Pro is a go-go if Bloomberg's sources are correct, that could also explain the bump up to 30M shipments, if you have a significant new model dropping Feb/March. 

lol Id be surprised if Switch 2 is 4K ready tbh.

What exactly does this article mean by '4K Ready'?

Is this a Switch Pro model capable of native 4K level resolution or is it just upscaling the image to 4K?
Either way, this just adds more fuel to the fire that some type of new Switch hardware is on the way.

Upscaling wouldn't really require conferring with developers, that's just an automatic process.

Or else NVidia managed to pull out a SoC way more powerful like they did with their new RTX

Nvidia DLSS could do it because you only need to hit 900p-1080p to get 4K. So if Nvidia is giving them a chip with Tensor cores, there's your answer right there. 

Also running Mario Kart 8 (a game that already runs at 1080p on the current Switch) at 4K is much, much different from running say ... a next-gen game at 4K. 

You can't just look at 4K as one standard metric. 

Pretty much this. DLSS 2.0 has been yielding some pretty incredible results.

Unless it's Jason Schreier reporting, Bloomberg isn't a useful place for video game news. And this did not come from Jason, so moving on.

I'm still waiting for the Wii HD. Michael Pachter swore that Nintendo would need it to be successful.

Most effective reconstruction requires scripting in software, like PS4 Pro's checkerboarding or DLSS. And 4k rarely means native 4k in console gaming.

I'm sure Series S can run games at 4k since PS4 Pro from 2016 can but its clearly not built with 4k in that in mind. And I think it can only hit 120fps at 1440p. 

It all depends on the game and Switch has enough of its own exclusives and indie titles nativey running at 900-1080p which can actually target native 4k, and then for more demanding titles they can have a DLSS like solution which requires the developers to implement it