You recently held your iPhone 4 to a Samsung phone and the angles of the rounded corners matched? And...what? Design patents are beyond stupid. Even if, as you imply, Samsung slavishly copied the look of the iPhone (which is debatable), why should that matter? Companies have been making knock offs of just about any popular product for ages. From a status point of view, most people want the original, not the knock off. I don't see the big harm to Apple if people imitate their look. If anything, it adds value because it increases the desire factor for their product.
I'd be a lot more sympathetic about Apple getting sued for implementing things that are obvious or only similar to these patents if they hadn't gone nuclear with "rectangles with rounded corners" and "icons in a grid".