Well, Win8 works on tablets and phones.
It DOES NOT WORK ON PCs! Normally, I try out new versions of windows in the beta to decide whether or not I want to adopt it. This has helped me avoid Vista, and now it's going to help me avoid Win8. There are some great features in Win8, but the new Start is not one of them. It breaks workflow, it makes everything much harder to get to, it breaks up applications into app versions and full-version, but it's not apparent how to get to either one. It's just terrible.
I guess we'll have to wait for Win9 or even Win10 (or WinX... just wait, you know they'll do it) to fix this conundrum.