The biggest CRT ever made: Sony's PVM-4300

I'm kinda curious if CRT technology advanced to the point where a TV like that would've been possible at a better weight and price tag? I assume that CRT technology development stopped decades ago, but could we have e.g., replaced the heavy glass with some plastic-like material to save weight without compromising the picture? And are there any heavy components in the mechanism itself (Coils, Magnets?) that would have had alternatives?

I know it's just theorycrafting, but I do wonder what kind of CRT someone could've created if it wasn't for market economy forces.

The next big thing was supposed to be Field Emission Displays. Microscopic electron guns directly behind each phosphor. The big manufacturers experimented and tried getting it commercialized for decades, then pretty much gave up in the 2000s when LCDs got stupid cheap.

https://www.engineersgarage.com/field-emission-display/

There was also a brief reign of plasma TVs in-between, now almost a forgotten technology

A good 720p plasma is still a great display to this day.

I have the second to last generation Panasonic plasmas. 42" 1080p display. At first the picture was amazing but over time it degraded slightly with what looks like subtle noise affecting the entire display. Solid colors have a faint shimmer of noise in them. As if white noise was blended with everything.

I still use it as a bedroom TV. I can barely lift it myself and it claims to use 450watts of power. It's certainly a lot. It's notably warm near it and will heat my room if I don't open the door.

Still the picture quality is very good at a distance. Only oled or micro led displays look better.