Nice. Really sets off the apple as a strong focal point, like the bulls-eye.
Yeah, in regards to primitive shapes, those who use it visibly are emphasizing the design, and are making a strong visual statement, where the design is equally as important as the subject. It's an elegant approach in the clarity of it, and it's also fun to see how much extraneous stuff can be removed. It also really draws the attention to the specifics of what is in the picture -- like shape and texture, lighting along with a known flavor that the viewer can bring to the experience from their personal familiarity with the subjects.