Design is both how it looks and how it works. If you take the Desktop WIMP UI, and try to come up with a way to redesign it work with only touch instead of mous

Design is both how it looks and how it works. If you take the Desktop WIMP UI, and try to come up with a way to redesign it work with only touch instead of mouse and keyboard, you'd roughly be already halfway to the iOS homescreen in terms of design. Instead of clicking on a icon, you touch it and the app opens, swipe to see multiple homescreens since desktop space is limited on a phone, add in a dock at the bottom. Contrast that with Metro. So that screenshot is NOT irrelevant.