Certainly it is more than just a basic ending, which certainly deserves exploration, but it is fundamentally a paradox, thus probably best used as a great place for people to explore more complex philosophy - this film is a great example of how philosophy can be explored by a quality script and director. I really do recommend films like Adaptation if you want films that make you think, and dissect... I would also highly recommend something like Heaven or Dirty Pretty Things which are both lovely in their execution yet don't try to solve any issues within there own limited, filmic, boundaries. Thinking slightly more mainstream, Gattaca also manages to raise some very important issues whilst maintaining the integrity of cinema; ham fisted philosophy like Reloaded certainly does not (but that’s probably a whole other debate).