That's not even close to accurate. For movies and some streaming shows yes but boadcast is still SD/HD apart from a few niche services.
Also, my statement said being produced. I don't think many content creators are filming in 480p or 720p in 2020. They're filming on much higher resolution cameras. For example, BBC iplayer offers the fuller visual fidelity experience of the programs they produce.
Sadly TV broadcasting is way behind the times.