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Besides there, there is also a 4k OTA standard, ATSC 3.0. Most TVs don’t support it yet, but some do. Worth googling before you buy. You can also get something like an silcondust 4k standalone tuner and plug that into your home network instead. You then load its app to watch over the air TV in 4k.
If you do buy the silicondust tuner, you can go further and get a DVR going. Plenty of free projects that will help you setup and record TV like jellyfin, and many of them will auto-skip the ads too with an application called comskip.
I’m still new to this myself, but yes that’s the gist of it. This isn’t k8s or even k3s. It’s an easy way to deploy a container via code on a single node system using the already present systemd for management. It let’s you pretend that Linux handles containers natively like it does daemons.
This article from redhat has more information about the why and what.