Windows 8 Is pretty pointless unless you have a TouchScreen with a fast enough processors. It'd be like a Windows 95 machine upgrading to XP SP3 or Windows 7 I guess.
Believe it or not there are companies out there that are making so to say Touch Screen glass to where you'd just plug it in via usb and enjoy it.
http://www.youtube.com/watch?v=3ngrsTJ5o8w
Pretty cool stuff not what I was looking for but still you get the idea.