I'm not entirely sure who The Boxtrolls is "for" (other than me) in the sense of target demographic or potential audience. It's a stop-motion animated film, hardly an historically record-breaker at the box office, and Laika (the studio behind Coraline and ParaNorman) hasn't bucked this trend. And while it's been marketed as a family film, its tone and sensibilities have more in common with PG-rated "kids" films of the 80's than more modern fare, the kind like Ghostbusters or Gremlins that have just as much material for the adults that will fly far enough over the heads of kid audiences that it's still "safe" for them. Barely.
But I'm pretty ecstatic that it exists at all, regardless of why.