Okay, keeping the spoilers out of the bulk, so feel free to read whether you've seen the film yet or not. First off, Looper makes a good first impression by having a very solid and believable vision of the future. I wouldn't call it quite hard sci-fi, but it jibed with my sensibilities a lot better than most. It's fun to look at societies and technologies that are fundamentally and wildly different from the ones we have now, but it's ludicrous to suggest that this is the way the future is actually going to happen. Since most future-focused movies claim to make exactly this suggestion in their exposition, that's the lens I tend to inspect them with.