I have tried Win 8 on a spare machine and while the OS runs really nice a smooth and is quick i just cant stand the user interface "metro" they are trying to hide critical parts of the OS and make it more difficult for users to find and do things within the OS. i for one will be sticking with windows 7 which is in my opinion the best OS microsoft have ever produced. It does seems to me they are attempting to copy Apples model which works well for them, but on my PC i want easy access to the file system and as already stated i do NOT want a million apps all shouting for my attention in the middle of my screen. Trust Microsoft to make some thing that runs really well and then break with an interface that only works well with a touch screen and is awful with a mouse and keyboard. I would like to see an option to choose between the new interface and the original start menu and desktop, if that was possible i would recommend it as if you wanted the new interface you could have it but it you preferred the task bar and start menu you could have it with out modding your whole UI.
As far as it goes with windows 8 its looking like i will be skipping this one as and hoping the next version is a return to the incremental updates and a return to the start menu and task bar i am used to and love.