This is from Swedens Ågesta Nuclear Plant, the first in the country.
I don't really get why you'd need all the used floor space. That seems to really be the key difference from those early control rooms and more modern ones. The old ones had you walking around and the new ones are designed to keep you seated. Still, it seems like the old ones had an excessive amount of floor space.
It required a lot of wires back in the day. A lot.
Similarly, the stereotypical giant plasma displays in old-school telco/ISP NOCs made for a properly toasty environment. I know one ISP in the early 2000s who had to bring in a spare datacentre aircon unit to reinforce the puny office system which was completely unable to cope by itself.
Soviets/Russians seems to select the seafoam or tealish green colors as backgrounds since these colors create a calmer environment which helps when everything else is pressuring you.
The most interesting thing is public ISS telemetry page at [2]. Go to Russian version and the color scheme changes to a bluish one which they also use with some of the interiors/control panels Russians use in similar equipment.