Just curious because I don’t see people talk about it a lot.
Ads, ads everywhere.
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.
Bandwidth is cheaper from the tower since the signal is the “same” for each client and it can then be distributed over a wide area. You send the “DRM” (Just a fancy encryption key) over the network since it’s relatively small and likely unique to each device (probably fingerprinting the device ids to the content invisibily in case of piracy).