If I'm trying to see how it's useful, attaching your country's identity to a cultural practice is a good first step to then fund and prop up/support said practice - while the list itself doesn't change much, you can refer to it to show the demoscene is worthwile and argue for funding/support.
> fund and prop up/support said practice
I wonder how this would look in practice in the case of the demoscene.
I feel like there was a moment in the earöy 2010s-ish when there was an interest in the demoscene as one aspect of "digital art", along with games, animation etc. Seems to have faded a bit, maybe because the focus of the demoscene shifted towards size limits where the aesthetic accomplishments can be less immidiately obvious to the uninitiated.