In most of the movies and TV-series I have watched, whenever there is some kind of "technology" involved (say, like a tracking device or hacking something important), there is a lot of unnecessary, impractical key-pressing and fancy colors and sounds (a lot of 1's and 0's going on the screen and a lot of "beep"s).
For example, take the TV-series Primeval. Their device for tracking anomalies have a lot of the things said above.
Why do movies and TV-series employ this kind of false-looking tech? It would have been much easier to use a real OS (like MacOS for normal things and Linux for hacking-kind-of things), maybe with a custom-made software suited to the task. It would have been more realistic.
So is there any specific reason for this?