You must be joking about Jurassic Park, right?
The systems in Jurassic Park are clearly and obviously running IRIX on SGI workstations, and the girl character says as much when she recognizes Unix. The file system navigator app is famous from its appearance there.
Plan 9 has never been portrayed as a running system in Hollywood, because it has never run any system of consequence in real life either.
... it's a joke. A perfect example of how Plan 9 humor works.
In fact, it was quickly superseded by Inferno and Limbo, in AT&T race to compete with JavaOS, which is why Dis also got initial support to convert between bytecode formats.
Overall, after the sale to Vita Nuova, one could assert Inferno has had much more real commercial use than Plan 9 has ever had outside Bell Labs.
Yet Plan 9 fans seldom acknowledge it was a transition between UNIX and Inferno.