Have you tried Windows 8 Consumer Preview? If you did you will see it is not a joke. You really cannot use that operating system. Andrea Borman.
I am using it on my laptop, which is my second computer. I installed it on the 29th, and since then I have managed to install every program that was running on Windows 7, I have organised my start screen, made a new Microsoft account, connected my twitter and gmail to the Metro Apps, consolidated my partitions in disk management, set up my language and regional settings so that everything displays in English but accepts Swiss German input and so far, the only problem I've had is that the four corners thing for the mouse messes with Mouse Without Borders.
Oh, and I made a custom keyboard layout to cater for my Swiss German keyboard that is still QWERTY rather than QWERTZ, but that won't seem to install in Windows 8, for some reason, despite it being listed.
With regards to it "not being usable by anyone" I strongly disagree. All in all, it probably took me less than two hours to get to grips with the new start screen and account options. I love that I can sign in on my desktop and have the Metro layout synced pretty much instantly. Skydrive integration is already brilliant although I suggest it's not finished yet either.
So yea, you rally can use that operating system. At the very least you can spend all your time in the desktop mode and just press the windows key and type like you would in the start menu anyway. Oh wait, I forget, you were still using the less functional, less powerful and less efficient old fashioned start menu from Windows XP!
Since installing it on my laptop, I have not needed to boot into Windows 7 to fix anything, use a program or just because I was annoyed by something. Learning how to use new software is fun, not an evil task sent forth by the Devil.