I have to LOL at all the people that don't understand Win8 and Metro UI. One of the Reasons for windows 8 Is to do away with the need for a hardware Bios. Which is something Google is trying to do with Chromium. Also another concept with Both OSX and Google is the Cloud integration. Microsoft is also moving to this Idea and has been slowly, very slowly moving to this for years. Microsoft is making win8 to be much like OSX in they they won't have to build a new OS anymore. They can just keep updating this mush like the way OSX has been for years.

As for the metro UI on a desktop. I can guaranty nobody that complains about it has used it with a Arc Touch mouse. You can have multitouch input on a desktop and it works great. If you don't think so I suggest you get the right equipment and try it out they way it's meant to be used.