Yes, Will Smith keeps setting the table for his son to take over “the family business,” and even by Hollywood standards, this can feel like he is “pimping him out,” as many commentators are noting. And yes, M. Night Shyamalan directed it. But he’s made good movies, and Jaden Smith hasn’t been bad in the couple of films he’s done. So we’ll reserve judgment on “After Earth,” even though its premise and digital critter effects aren’t exacting bowling any of us over pre-release. If it’s good, it will have a hard time making any box office headway in this crowded marketplace. “After Earth” opens Friday.