Agreed, business is not ready for touch-only desktops, and may never be (never = 1 or 2 generations of office workers). Still Windows 8 will be huge for business because of the mobile devices with true Windows on board. All the functionality and security that we're used to, guaranteed, because it's the same code. As long as Win 7 or some dual interface version of Windows is compatible, we'll see hybrid usage for quite a while.
Eventually, of course, touch will become ubiquitous, and quicker than most think, I'm guessing. Then picking it up on the office desktop will be obvious.
Microsoft seems to have gotten into a habit of trying to force the market into their vision of the future. They should remember what happened to IBM and, more recently, Apple when they tried to do that. Both times, Microsoft won big picking up the refugees.
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