But Cobb has bigger problems to deal with. He's accused of murdering his wife, and the film is all about him doing "one last job" so he can clear his name and move back to America and see his kids.
Finally (SPOILER!) he appears to have accomplished just that in the final scene. The job is successful, he comes back home and he hugs his kids -- whether the whole thing was a dream or not is the subject of another article.
Spoiler: Leo is a replicant.
But What About ...
Uh, what about Cobol?
Over the two-plus hours of the run time, the film seems to forget that this huge, unscrupulous corporation still wants to murder Leo's ass and has black vans full of thugs capable of doing it (they've taken out one team member already). And let's face it: If they were able to track him down to Kenya, it shouldn't be too difficult to find him in America. At his house.
So the ending to this film becomes significantly less happy when we realize that, hell, they'll probably now have to murder his kids, too, to get rid of any witnesses.
"Hit men are looking for me. I should hide at home with my innocent children."