You make a good point that it might not be the steady state of the display market, but I think it is for the majority of TVs today.

As alternatives, you can buy commercial displays that are effectively TVs (with HDMI in), however they lag in specs and lack some features. You can also buy hospitality versions of TVs as 'dumb' TVs for a similar price, but these also tend to have lower specs. You can buy large format computer monitors (55" is about the highest I've seen) but they are substantially more expensive (roughly 3x more expensive) and typically use DisplayPort instead of HDMI.

I only learned about the options because I'm looking to replace my 2013 Plasma TV that has a power supply problem.