I managed to preview Windows 8 some time back, and my verdict is…no. Heck no.
Although the layout is great for smartphones and tablets, it looks terrible on a regular computer. Microsoft should have figured out a way to have it render differently on desktops/laptops or at least include an option to automatically boot into the desktop mode rather than going through the Metro layout.
Also…whose bright idea was it to get rid of the Start button!?