Good suggestions you made there. One minor detail though (and I’m reaching here…)
Not that anyone would buy a big 4K monitor and run it in 1080p, but I’ll bet somebody somewhere has thought that bigger would automatically make their 1080p experience better, when in fact it can make it worse.
For any given resolution there are the same number of pixels in a 19" monitor as in a 65" monitor. As such, those pixels will be farther apart on a bigger monitor. Sitting close to a big monitor @ 1080p will be a less-than-ideal experience. In short, the bigger the monitor, the higher the resolution needed to look good at a given viewing distance.
4K opens up the big monitor experience for people sitting fairly close to their TV’s.