There is no compelling business case in most instances. I am sure over time as people become used to W8 and a few bugs are worked out it will happen.

Personally I am very interested in having a look at the Surface pro when it comes out. Mainly because of the touch centric OS and the purported ability of the device to integrate well into Windows based network infrastructure.

I would suspect this may become the thin end of the wedge as far as acceptance of Window 8 in our environment. That said I would think the earliest adoption for a standard workstation would be at least a couple years out. Assuming of course Windows 9 is not released in the mean time.