Windows 8 have been unsuccessful in many ways. It has Metro UI that is designed for tablets. Desktop users have been forgotten totally. In many ways the Windows 8 metro is step backwards. It can display only one program at the time. Heck what Windows stands for? It is even printed on their logo. Multiple windows screens is the essence of windows operating system. I think they have been copying other tablet UIs with their pros and cons. Made it simpler in graphics which have been successful by the way. Simple tiles with one color is the best that Metro UI provides.
Desktop looks almost as in Windows 7. The graphics have been simplified as mentioned. The 2D feels quicker and it is easy for eyes. Many have been unhappy with the lack of start button. I see the chance only as lack of physical button. Start window is as good in many ways that Start button before. It has customize options and have all the functionality as before. I think the best way to please desktop users would be provide desktop versions of the programs used in Metro and leave Start window as it is. Then desktop users would have multiple windows as before and functionality of Start button which would be Start window. Is there button or not is totally irrelevant.