Change isn't always a good thing.
This change was to bite into the tablet/touchscreen market. The cost was that it alienated the mouse and keyboard market (me). I liked the things that were brought in with Windows 7 e.g. taskbar pinning, snap windows. I was looking forward to trying this new "Metro" interface everyone was raving about. I tried it and didn't like it. I found I was having to move my mouse more because of switching between the metro and desktop interfaces (more of a pain in the thumb if I break out my trackball). I was having trouble finding things, e.g. honestly, who puts the off button under settings? There were menus in places without something to highlight them.
I was also finding that Windows 8 was treating metro and the desktop as seperate sessions e.g. run IE from metro and do certain things, then run IE from the desktop and those previous things were not logged. It's the same login, why treat the two screens as seperate sessions?
All in, I found too much I didn't like about 8 and chose to wait until Microsoft re-implemented the things I missed before I would take it on. Hopefully, SP1 will see it, probably not. I doubt if Windows 9 will see it so I may be looking at Windows 7 for a very long time and moving to linux after that.