Compared to from Win 95 to Win 7 has been accustomed to Windows 8 with the "tiles" of course, things have changed. But if you take impartially would pick up, you will notice that this concept does not have to be necessarily bad. And Win 8.1 can easily be started directly with the desktop view. This is the same with small changes is not much different than that of Win. 7
Even with the introduction of other Windows generations, there were initially repeated criticism. Except for Vista has changed but still quite fast this.