How does this compare to another field, say cars? I recently been car shopping for the first time, and the similarities between sedan models is amazing. Due to

How does this compare to another field, say cars? I recently been car shopping for the first time, and the similarities between sedan models is amazing. Due to the nature of a car, and a sedan at that, it seems that all models have to follow a similar design for them to be functional and acceptable. If a trade dress results in the monopoly of an industry, I assume then that the it would have to be avoided, or everyone pays Apple a small fee for use of the shape. The issue as well is that many phones are all the same shape - rectangular, and many had rounded corners before Apple. Nokia have been using a XxX grid of icons for years before Apple. So essentially Apple is trying to trademark all of these elements put together as a trade dress issue. But then Apple did take the time to invest and research the iPhone so they should take some of the benefits, but why sue so late?