I haven’t tried the Windows 8 Consumer Preview (I am currently away from my fast Internet connection) but I did download and try out the previous Developers Preview. So I am not surprised by the opinion that I see building, which is that you need a touch screen to appreciate Windows 8. I think a post at ZDNet by Adrian Kingsley-Hughes sums it up. He says:
If you’re fortunate enough to have touch-based hardware platform to run Windows 8 on then Windows 8 will offer you a far better experience than any other Microsoft operating system. But if you’re sitting in front of a system that has a keyboard and mouse attached, then it’s hard to make a compelling case for Microsoft’s newest operating system.