I've been trying to figure this out online, and all I can find are guides on how to stream to Xbox to PC, or how to use the PC app on PC, but that doesn't solve my issue. I want to stream the Xbox Gamepass games from my desktop to my big 4k TV in another room (like I do with my little steambox). Can I do this and if so how? Please help, thanks!

There was an article I saw how to do this not to long ago, I will see if I can track it down.

Thank you! I've been looking for months now.

I guess no one has any ideas on this? I can't be the only PC overlord who wants to stream games to their much larger TV monitor?

https://cogconnected.com/2019/03/app-allows-stream-pc-games-xbox-one/

Hope this is what you are looking for.

No not to Xbox one. Just to a tv without a box.

You need an Xbox One to achieve that directly.
This is probably doable with some thirdparties tho

So you want to stream your PC gamepass to your TV without an Xbox. I am not sure if this can be done.

If you can't or don't want to use a long cable, the only option I see is wireless HDMI. No idea about the lag though.

As that is definitely an option, I know unplugging my PC and lugging it from my computer room to my living room and then plugging it all up again would sour on me pretty quick.