I have installed pre-release Windows 8 on a couple of occasions and it would appear that I am not the only one who does NOT like the new user interface (UI).
Here is a comment from PC World….and also here is an observation from a gentleman on the similar Windows Server 2012 UI:
......".....To open the Start screen, click the Windows icon in the middle of the Charms bar. This will open a screen like the one shown in Figure B. This is the new Start screen, which replaces the eminently usable Start menu from older versions of Windows. Now, rather than a single click on an obvious screen location to open it, it requires multiple mouse movements into what seem to be random portions of the screen before that single click opens a Start screen for administrators to use.
It will be interesting to see just how Windows 8 is received in the marketplace…