TVs are cheap now because viewers are the product. From what I've heard, "dumb" TVs and other high end displays (PC monitors, TVs designed for business and education use, medical imaging displays, etc.) are still rather expensive

Our first colour tv cost about 3 months of my dad's salary in the early 1970s. And the Siemens mainframe computer in the company he worked for was tens of thousands (which was more than a year's worth of the average salary). Rent. Every month. It had less computing power than my smartphone.

I've noticed how cheap TVs are. I was thinking of getting one for like the first time in decades and I got sort of reverse sticker shock at how much screen you can get for so cheap a price.

Hand in hand with that, there's a lot more marketing gobbledy-gook out there trying to upsell schmucks on features that are only marginally better, probably because basic large TVs are so cheap now. So they try hard to get people to upgrade more frequently than needed, or to get features that probably won't make one iota of a difference in the viewing experience, just to sell more units/pricier units.