I'm not sure if I was "inspired" to be a scientist by film, but I would say that the movies "Ghostbusters" and "Back To The Future" certainly provided me with a lot of motivation for "Science!" (with the exclaimation point). I'm not sure, though, if those movies actually helped shape my interests, or whether they just resonated strongly with my existing interests and proclivities. And those were two of the most popular films of the 1980's, so it might be more correct to say "Awesome movies inspire people", which is one of the general reasons for pursing cinematography as an occupation (I'm sure GB and BTTF also inspired a lot of comedians and film students, too).
And it's not like Ghostbusters or BTTF are particularly accurate protrayals of the scientific or engineering process, either. I'm not sure I'd want to see an "accurate" film about the scientific process, though: wouldn't it be just a long montage sequence of all the reagents that didn't work; with a gripping B-plot on writing a grant proposal. That said, most films about a particular field or occupation are heavily dramatized. Haven't several people commented that shows like CSI use incredibly compressed evidence gathering cycles; and that in the real world it takes a month or so to process DNA evidence, and most crime scenes are either inconclusive, or heavily contamiated by the victim's dog before the cops ever get there.
As a very broad, crude generalization, introducing the reality of occupations, like science or business or the technical fields or agriculture, into movies is probably desirable, more as anti-inspirational "warning" than anything else. Most of these jobs are boring most of the time, so stay away. But if we present the jobs honestly and with reasonable fidelity, then the one-in-a-thousand that isn't turned off by it might actually be a good fit for that job. The film doesn't have to "inspire" people, just broaden their horizons so they are at least aware of the opportunities available.
Anyway, this is what happens when I ramble on caffeine.