as the Director of IT for a small biotech company, I don't plan to deploy Windows 8 to any of our existing 600+ desktops and laptops. It's not because of the learning curve. It's because most of the desktops are more than 4 years old and most of our enterprise applications are even older. The desktops can't handle Win 8 and I don't have a compelling reason to upgrade or replace them.
I suspect most companies are in the same situation of shrinking budgets, aging applications, and Windows XP boxes.
I have a three year keep, refresh, or obsolete plan for all of my hardware and software. Windows 8 is not in that plan. We are slowly rolling out Windows 7.
The staff can learn to use Win 8 on their home computers.
My IT staff can test Win 8 out at work and I will probably bring in a personal Windows Surface Pro to try out on the domain.
That doesn't mean that I don't like Windows 8.
It just means that it is not practical in my enterprise environment at this time.