You mean they dont still use 1980s computer screens in 22nd century Star Trek?
All of that said...
There's a certain correctness in my head to the idea that in a pre-replicator future [0], it would be more smart to use a bunch of physical buttons and CRT type monitors.
The main reason that comes to mind, is that a simple CRT is probably easier to fabricate on a deep space mission than a flat screen, if it needs replacement. Similar for all the buttons/lights/switches.
Now, it wouldn't necessarily be -easy- for a ship in deep space to re-fab these components. Thus the need for 'low-fi' graphics, since you might be in a region where the best your folks can fab is NTSC-quality.
[0] - While TOS had food synthesizers, that seems like a subset of a full replicator's functionality.
Modern high definition scans of the original film looks hilariously bad on modern TVs. It looked far less bad on TVs contemporary with the original broadcasts.
The modern HD scans of the original film look fantastic. They do, however, show how low-budget the sets were, but the detail of the original film is quite amazing, and these old shows look far better than most stuff produced in the 1990s which was done using videotape.
The best episode of Star Trek, City on the Edge of Forever, holds up today because of its story and its period sets and costumes, not its sci-fi stuff.