Win 8 may be great for kiosks and phones .
Most businesses and home users still use keyboards and mice.
Many corporations are still XP because it works .
True for the moment, but many also now use tablets with touch tech in many formats. Desktop pcs with touch tech have been around for a while and it won’t be that long before the price drops and touch tech along with mouse and keyboard become the norm. The current touch desktops still use a KB and mouse.
Actually, most corporations have moved to Win7 unless they stopped renewing their EA or support agreements with Microsoft.
XP is no longer provided, supported, or licensed by Microsoft. If you run a corporation on XP workstations and are using newer technologies such as Server 2008/2012, you're going to have a lot of program problems, esp. with 64-bit platforms.
Win8 isn't universally accepted, and there's a lot of doubt in the tech community that it ever will. Touch platforms are not universally accessible or sensible for business.