You really want to get down with a turtleneck-and-ponytail discussion, the justification for the metallic styling of Apple products involves an sub-conscience connection with kitchen and dining room utensils. That is, they are bright, bring attention and, most of all, you are in control over how they are used. Wood-worked items tend to be stationary, large and not dynamic. There are a few exception such as chopsticks and salad forks, but most tools one uses at home that are valued are made of metal. Hence the look of current Apple products. Q.E.D.