What can I expect for Xbox series s 4K

What resolution are you trying to run at

If 4k 120 Hz then no it won't run at thaf

The max for series s is 1440p at 120hz

It will play at 4k bur only some games and with issues

The series s is meant for 1080p 120 max

With suggested 90hz

The xbox series x and ps5 and switch pro are the only 4k consoles

One x does 4k at 30hz and ps4 pro upscales

You will need the Xbox Series X for 4K 120hz. The Series S can only do 1440p 120hz

Well no the xbox series s isn't capable of 4k 120hz video games it's not even capable of 4k 60hz

That's the series x

The best the series s can do is 1440p

The reason why you aren't getting any signal is because the series s isn't capable of it

Only in streaming not gaming

This is the offical.ms.papers on series s

https://www.xbox.com/en-CA/consoles/xbox-series-s

As noted it's only capable of 120hz on 1440p in games and 4,k 120hz on streaming

Not a lot of games support 4k 120hz even on xbox series x

Even on backwards compatibility games it's a max of 60fps with yakuza running at 900 frames

You gotta remember it's upscaled not native

Hence the lesser space requirements for series s

I wouldn't consider anything that does not offer 4k @ 60fps (Or 4k ((Upscaled) @ 120fps) to even be next/current-gen. We've been living in a 30fps world for far too long. Upgrades we're promised and while many games aren't optimized perfectly (and, lets be honest "Series X/S Optimized" really just means "we upgraded it for the Series X capabilities and just assumed it would be fine on the Series S") better performance should be expected.

Basically the rundown is:

Xbox Series X:

Has a spot for discs

Has better graphics

More Expensive

Xbox Series S:

Entirely Digital (No spot for a disk)

Not as great graphics but still good

Less Expensive

So it's honestly up to you whether or not you want to get the better of the consoles, though the Xbox Series S would work for everything you would want it to.

If you still aren't sure you can look at this article I found explaining it more in-depth: https://www.techradar.com/news/xbox-series-x-vs-xbox-series-s-which-xbox-will-be-right-for-you

I wouldn't consider the Series S as the lesser of the two,

These consoles are much more like PC's in term's of spec and performance than previous generation consoles, and as with PC gaming, you get / buy or build a system to what resolution and refresh rate of what your TV / Monitor is being used,

"as an example",

"Your not going to buy an RTX 3090 for your PC at £/$1,500 just for the card, that's capable of gaming at 8K to only use it on a 1080p TV / Monitor, that's a huge waste of money."

The same can be said of these new consoles,

The Series S is designed and aimed at 1080p/1440p gaming as to why the spec's of the Series S aren't as high as the Series X, because if your not planning on gaming at 4K, you don't need all that extra power that the Series X offers as that is designed and
aimed at 4K gaming.

I have a 4K TV and a 4K Gaming Monitor so for me, I'm get the Series X,

However, If I was to only have a 1080p TV / Monitor and no plan's of upgrading to 4K, I would've been getting the Series S instead.