IMO the only Windows 8 peripheral that actually makes W8's Modern UI bearable on a non-touch PC is the T650 wireless touchpad by Logitech. Simply changing the scroll wheel to a small touchpad isn't going to cut it. The T650 makes it a relatively enjoyable experience after a bit of a learning curve.
At first I though it would be really nice to have win8 functions on a mouse like this until a realized that swiping in from different directions works for touch because your hand is already on that side of the screen. Swiping in on a mouse still means that you have to move your mouse to the side of the screen to get the menu to do anything. Other than pinch to zoom functionality it is kinda pointless in a lot of ways.
Still curious to see the review, but I think that there will not be a compelling touch replacement until we get gesture support from kinect for PC (retail, not the current dev kit), or touch emulation from a device like leap motion.